Don't know about the 2011, but I hearda lot about the glare and washed out nature if the pou50. As a first time flat screen owner, I find these concerns overblown and geek-tech oriented. If you have bright lights facing the tv, of cours you will se reflections; however, I thnk the picture is stunning, the different viewing modes compensates (custom, cinema, vivid, etc,) and the colors are stunning. Highly recommend.
I own a u50 and the glare is bad, and it must be kept in a darkened room. The picture quality is decent on certain settings, with it sometimes looking washed out. This model of plasma tv wont get too bright if you want it to be.
I haven't seen the 2011 gt25 but I watch tv in a family room with many windows and under those conditions it was difficult to see, but this tv is very bright and clear from various angles. Hope this was helpful.
I have a 32 in Element hdtv, lcd. Picture is good. I bought the 50 in for our larger living room and the quality is way better than our 32. clarity is sharp, three windows in the room do not effect glare. Great tv...