I'm still on a 770 as well... I'll admit, it's on life support. Without 2007HE, I'd still be running 2006 with a very limited shelf life. I skipped the N800, and will most likely go to an N810 (presuming I can convince myself the GPS doesn't completely suck).

All I'll say is this. Though they're extremely similar on the inside, make sure you're not upgrading to a unit that will be tossed by the wayside in a few months.