I got a fantastic deal on a Tallboy C from Competitive Cyclist, and I've been quite happy with the bike. Packaging was good, shipping was quick, putting the bike together was easy. I do try to spend money locally when I can, but 54% off the exact bike you want is a pretty stellar deal. I haven't had any warranty concerns with the bike, so I can't rate that side of the experience.

Unfortunately for me, being 6'4" means I often can't find a bike locally to try or purchase off the floor anyway. In that case, it's the difference between having a local dealer order a frame or doing it myself.