Say what you will about magazine tests, sensitivity, price, etc. most owners will tell you that the best money spent on a radar detector is for the Valentine 1. You've probably seen the ads in Car & Driver and other magazines. Well it's all true. This detector is in a league all it's own. It's expensive. But once it saves you from even one speeding ticket, consider that it has paid for itself. This should be one of the first investments you make for your car. I could tell you more about this outstanding detector, but why not simply go to the Valentine One web site and read all about it.
Note: I have no affiliation with this company other than being a very satisfied customer.