There is a group in yahoo groups for series 7 owners you can join, there is a lot of good information there. I purchased a 750 last year and then upgraded to a 780. Now my sister-in-law has my 750 I traded in. Never had a problem with the 750, just wanted more. A lot of the problems have been solved with the firmware updates from what I've seen. Make sure if you buy one it has the latest updates. Your dealer should be able to do this before you leave the store.