There was a great thread on this last month that convinced me to purchase a tomtom 910, which I highly recommend. It's probably just over your price range, but they have some other models that are in your range. If their rebate offer is back (it was $100) then it's in your range.

I was a dedicated Garmin fan until I got this unit,

Here are a couple of the past threads


http://www.flyertalk.com/forum/showt...ghlight=tomtom
http://www.flyertalk.com/forum/showt...ghlight=tomtom


Ignore the highlighting, I searched for tomtom to find the threads (as you can't search for gps, three letters and all that)