is driving considered "travel"? i think so.

i'm looking into getting a portable gps system. i travel a ton for work and when i fly in, i usually have to drive about an hour to get to my destination. My husband feels that i should have one for several reasons:

1. I am completely directionally challenged and driving in cities like DC, LA, san fran, Houston, to name a few...have been difficult.

2. i'm in my mid-twenties, lost often, late at night

so. any reccs on a good portable gps system under $500 that is easy to use?

thanks for your help!