Your best bet is to invest some money into the whole radar detection crap, but not too much. Having a great radar detector still doesn't give you a license to speed. And even if you have a really great integrated radar detection setup, if you just constantly speed, you will definitely get caught.
Your best bet is to invest in an Escort Passport 8500 (perhaps the new X50 model) or a Valentine One and then stop there, unless you just have money to burn.
Radar detectors are pretty solid, but what if the cop just estimates your speed? Police officers are trained and certified to do that and a radar can't pickup their brain waves.