bike.? I have been looking for a bike for quite a while now, and I can't come to a decision. I have always had an "exercise" bike high on my list. However, that limits me to just the road so why not get a road bike. I kind of like the thought of doing some trail riding, but realistically, I'll probably keep it on the road using it around my community for excercise. I've been looking at the Trek FX series, but I have thoughts about just getting a mountain bike and buying a road set of rims/tires. The hybrid bikes that I've seen didn't grab my eye. Any thoughts would be appreciated.