Lardasse really nailed it. As long as you are not racing or chasing club riders, a cross or touring bike seems like a good choice. Stock wheels will tend to be tougher, and the frame will allow for fatter tires. But don't be talked out of a road bike if speed is your priority. You just might need to swap out the wheels.

I'm 6'4", 210, and I ride a touring bike most of the time. It's fast enough for riding around on my own, yet tough and versatile. I'll bring out the road bike when I'm trying to keep up with the club riders. The speed difference between those two is not that much. The hybrid, however, is noticeably slower, mostly because of the upright position, which makes you a giant sail.