I purchased the Samsung Galaxy tab 7.7 along with ASUS Transformer Prime TF201 at the beginning of 2012. When I received them both about the same time, I compared the two. Then I returned the ASUS Transformer Prime to the seller and kept the Samsung Galaxy tab 7.7. Both tablets have been considered the best tablets in their own categories. The Prime has the best overall features among the size 10.1 tablets, such as being thin and light, having micro SD card, very bright display, fastest processing speed (Tegra 3) etc. But Samsung Galaxy tab 7.7, which is a smaller size tablet, beat the Prime in big time in the display quality, specifically, the richness of display color, which is the most important factor for me to choose a tablet. I use a tablet mostly to watch HD movies in 1280x720 resolution in mkv or mp4 format while I am not using my 55 inch Samsung LED TV (Samsung UN55D7000 55-Inch 1080p 240Hz 3D LED HDTV ) at home. The Samsung Galaxy tab 7.7, equipped with Super AMOLED display and highest pixel density in the market, has the display quality which is very close to my Samsung 55-inch LED HDTV at home. The Samsung products (TVs and tablets) in recent years have the displays which can be characterized as being radiantly bright and lavishly colorful. Samsung's display technology seems to be their best kept secret, which makes their products have no rival in the industry and enjoy considerable price margin over other brands. It's simply the best. The display of the Samsung Galaxy tab 7.7 is just incredibly stunning. I have had great viewing pleasure with this tablet since the purchase. However, I did realize that the movie viewing is better in a dark indoor environment than in a bright outdoor environment. Please note that the SD card can be only formatted into FAT32 format in order to be recognized by the tablet. An HD movie in 720P resolution can be as big as 4.7 GB depending on how big the video bit rate is. A file size greater than 4 GB won't fit in an FAT32 micro SD card. What you can do is to reduce the video bit rate to 2.5 mb so that size of the movie would be reduced to around 2 GB, which can fit into the micro SD card. I use a free software called DVDVideoSoft to do so. After several experiments, I realized that using a combination of the 2.5mb video bit rate and a resolution of 1280x720 to compress/convert a high resolution video file (1080p, 720p) and then play it on the Samsung Galaxy tab is the best way to maintain the the picture quality shown on a 1080p large screen LCD/LED TV.
***Update***
As to the storage size, the Samsung Galaxy 7.7 tablet comes with 16GB internal storage and MicroSD card slot, which you can insert a maximum 32GB MicroSD card. Besides, you can buy a USB female port adapter dongle for Samsung Galaxy tablets to further expand your storage. This little thing will allow you to connect a flash drive or thumb drive to the tablet. Again, it has to be in FAT32 format. The Samsung brand is very expensive (around $20.00). I think this price is a rip-off. I bought a generic one from ebay at a very cheap price.
***Update***
After one month of use, I realized that in order to achieve the best picture quality of a high resolution movie on this tablet, you have to compress the movie into 4 mb video bitrate (as opposed to 2.5 mb) and 1280x720. With 2.5 mb video bitrate, I would see some mosaic in some scenes. When I raised it to 4 mb video bitrate, mosaic was gone, the image became much sharper and much more accurate. For a 2 hour movie, it would create a size lower than 4 GB, which can fit into the FAT32 formatted MicroSD card.
*** Update on March 23, 2012 - Galaxy 7.7 compared to Ipad 2 and Ipad 3 ***
A co-worker of mine brought his newly purchased Ipad 3 to the office, and I brought my Galaxy 7.7 and Ipad 2. We played the same video clip on three devices and compared them side-by-side. It is a 20-minute 1080p mpg video featuring some colorful natural scenery. We used "O Player HD" app on the Ipad 2 and Ipad 3, and "MX Video Player" on the Galaxy 7.7 tablet to play the video clip. After the extensive comparison, the people in my office reached consensus. The Ipad 3 has slightly better visual effect than Ipad 2, but its brightness, sharpness and color vividness are still no where near the Galaxy 7.7 tab. The difference between the Galaxy 7.7 and the two Ipads (Ipad 2 and Ipad 3) is much more obvious than the difference between Ipad 2 and Ipad 3. The allegedly much improved pixel resolution of the Ipad 3 is not as so easily noticeable when playing video (720p and 1080p) as viewing the photographs.
I admire Apple Ipad for being the first to introduce the tablet idea, which has allowed Apple enjoy much hype and greatest market share. I myself have owned an Ipad 2. But as a rational consumer of electronics and a serious tablet user, I believe Samsung Galaxy tablets, especially the Galaxy 7.7 tablet, seem to be the best choice in the market for watching high definition movies and TV shows because of its superior display quality.
*** Update on November 8, 2012 - Galaxy 7.7 vs. iPad 4 ***
I received the new iPad with Retina display (4th generation) yesterday. It's the most expensive tablet on the market. But I would say the price is probably justified. Despite the complaints about the proprietary features, iPad is by far the best tablet on the market in overall performance. The display is truly amazing. The speed is very fast. There is no delay in reading PDFs. I've written a review on Samsung Galaxy 7.7 earlier and spoken highly of its HD Super Amoled display. Well, the iPad Retina high resolution display (2048x1536) is a complement to the Galaxy 7.7, rather than a substitute of the same kind. They both are the best displays, but have different usages. The iPad Retina display is best suited for photo viewing. It has the most realistic colors and such high pixel density. The photos just look stunning if they are taken by a good camera. The Galaxy 7.7, however has somewhat exaggerated colors and brightness, which are best suited for movie viewing. The colors of most movies are often artificially enhanced. They are not the real colors that we see in our life. The Galaxy 7.7 is very faithful to reproduce that effect.