I just bought myself a Garmin nuvi 1250 ($132 at amazon with $10 discover discount). It's supposed to be on par with the older nuvi 255 series.
I was interested in getting a Nuvi 780, but I passed. I've been watching it all week and it just dropped to 178, which is a 21 dollar drop since I last saw it. It qualifies for the $10 Discover discount, too.