Suggestions on Portable GPS with voice

[bigq]

Anyone use one of these. I think one is Tom Tom?
Need to be able to remove it from car to car with a bright screen and talking directions.

[Jbb]

Bought a Tom Tom 510 on ebay just yesterday....2 guys here at work have them...and love them...:D

[Panic Button]

Garmin 276, 376 476 all have voice...