After reading those threads, i'm even more glad i bought the Garmin.
You do want to go play with all the units as much as possible before buying though. I was lucky in that friends had both the 2610 and the 700. I got limited time with the 700, and a few days here and there with the 2610, never on a real trip.
Strange that the UI was stated as cumbersome. I admit it takes about 1hr of actual use to fully remember what menus are what, and the logic behind the layout. After 1 road trip, i don't have a single confusion on what's what, and what's where on the UI. It is really fantastic.
Also, it has never frozen, or computer glitched in any way.
Slow reroute. Haven't seen this at all. There are 4 settings for routing, Fast to Best. The 30 sec routes some folks were mentioning must be full reroutes for a 1000mi+ trip, on Best mode.
goto:
http://www.gpscity.com/gps/brados/3229.1.8496150402218804366/template.html
watch the 3 little movies. They give you an idea what the UI is like.
Additionally, i've found that using the remote is the way to go. You don't have to reach for the unit, and there are more keys, as well as dedicated zoom keys.