Hello, I'm looking for a GPS unit for police work. I'd like it to have these abilities...

1. Voice address lookup

2. Show the street and block number of the street I'm on at all times, whether I'm navigating or not. ie. 2000 Memorial Dr.

3. Compass

Bullet 2 is very important to me. If there's anything close to this, I'd be happy to look into it. Thanks.