What would you suggest for a GPS for my car and why?

I want to make the purchase because I get lost. A lot. I hope to spend no more than $200, but am a really good and patient shopper. I also work somewhere that enables me to get an employee discount.
Features I am interested in are:
– spoken directions
– updated route if you miss a turn
– points of interest, i.e. food, gas, lodging
– long battery life and the ability to run it off the car’s power

Are there things you enjoy or found useless? Things you might encourage to value where as others you might do with out?