I'm looking for a new ride. I have a 2 year old KHS that I've pretty much set up for touring (Panniers - Bob Trailer - Fenders - etc). I' d like to get a bike to just do road rides of 25 to 50 miles. I've found a '07 Felt Racing Z80 @ $799.00, a '08 Cannondale CAAD9 6 @ $799.00, & a '08 Cannondale Synapse 6 Compact @ $849.00 at some of my LBS. I also found online a '07 K2 Red Zone (Triathlon) @ $749.95. All the bikes are new. The K2 spec.'s are much better than the other bikes. Frame, components, wheels, all of better quality. But I'm not sure that a Tri bike will fill my needs. I like the idea of the aero bars to allow tucking in a head wind. But my KHS is set up to ride more upright so that is what I'm used to. My other concern is my weight. I'm 6 ft - 220. My questions are: How flexible is a tri bike? Can it be a good general road bike? Would it be a good fit for what I'm looking for or would I have to modify it? Has anyone had any experience buying a bike online? Sorry for the long post. Any input will be greatly appreciated.