which to buy? 3790 or 3490? I know the 3490 is a newer model (and $100 more!) but beyond that, what are the actual differences? I just can't quite figure it out, and if it's worth the additional $100. Also, do these both use the same power cord as previous Nuvi's? - mine is a 760. I hope. I had to get my power cord hard-wired into my car.
I have the 3790 (see my review) and yes it can use at least some older model power cords but there is a caveat. I owned the Nuvi 205 and I had the cord snaked through the dashboard of my wife's Prius and was happy to find the 3790 could us the 205 power cord. However, the caveat is that the 3790 has an antenna built into its power cord for the live traffic updates and the 205 power cord does not so the live traffic updates don't work. The live traffic updates are not available in most places outside large metropolitan areas and the antenna makes the 3790 cord bulkier, so I don't mind sacraficing that for being able to use a thinner cord that I already have installed.
After having used the older model for several years, a few things I'd look for that the 3790 doesn't do: .. Does the voice command get you into the Tools section? .. Does the voice command recognize cities you name when setting up a destination? .. Does the voice command let you specify searching along a current route (I.E. -- no use locating something 5 miles away if its behind or far off the road)? .. Is the microphone good enough to easily use the blue tooth function for dialing and phone conversation? .. Can the Bluetooth interface download the address book from your wireless phone? (Just once, by 3790 gave me sight into my address book, but never again as an option from my screen. Really Strange). .. How long to wait between screens before you can issue the next voice command? .. Does the trip planner allow you to sort the different trips you've stored with it? .. If you create an address within trip planner, can you edit it to add a destination name or phone number? .. Will the voice command work with the trip planner? .. Compare the amounts of on-board memory available. My 3790 has far more capacity than my previous 265. I've never had to delete something to make room for newer updates, I've always been able to get coverage of all 50 states + Canada + US territories, where as my 1390, I opt for just half the lower 48 ... all I need for that model. .. Is the battery user replaceable? .. Compare the time to find satellites in downtown areas, or a forest (tall trees).