I have a basic wireless Specialized. It's waterproof, easy to set up, looks good (white computer matches my paint), and gives me the basic information I want (speed and tripometer). I read about some people having problems with the computer falling out of its mount (mostly MTB guys), and when I bought mine from an LBS I asked them about it. Specialized has redesigned the mount so the computer slides in from the side and clicks into place. Mine has never come loose in 150 miles or so thus far. Oh, and the odometer is neat to have as well... I put the computer on my new bike before my first ride, so I know exactly how many miles are on the bike

I don't really care about knowing my cadence or heart rate, and don't need GPS. Worst comes to worst, I always ride with my iPhone, which has GPS.