Handheld GPS

[SouthernDZ]

I'm finally moving into the new millenium and need to buy a handheld GPS that I can use here in the U.S. and over in Europe. My job requires me to travel all over frequently and I think this is the way to go but I'm pretty clueless here:

What is a good commercial handheld GPS that accepts software with German streets (going to Grafenwoehr later this month).

Thanks in advance!