Escort Radar Max 360
What it is: An intelligent radar detector
By the time you see a cop, the chances are they've already determined whether or not to pull you over, which makes the argument for a radar detector pretty strong. This is one of the most powerful on the market, and it learns from its mistakes, so the more you use it the better it gets. It also comes with a continually updating registry of known speed-trap locations, and it will warn you when you're headed toward one, even if it doesn't detect radar yet. Not too shabby.