I've got the Nuvi 360 and love it. I really did not care about the bluetooth, but the Costco deal a few months ago at $250 beat any other deals out there. The bluetooth does make for a decent speakerphone. It is now my only device for plane travel since I can load MP3s onto it and listen while I watch where the plane is. The only negative here is it does not have very many volume levels.
I'm glad I did not pay more for the larger screen. With the text to speech I rarely look at it unless I am programming and there is still plenty of screen to see everything you have to.