A thought on fit, from experience: be careful with having a deathgrip on the handlebar. When I was learning, my grip was so tight that I pulled a tendon near my right elbow that took seven months to heal, even with PT and acupuncture. I couldn't even turn a doorknob. While I was convalescing, Robert at Cruzbike suggested to imagine the handlebar as a couple of ripe bananas--that the grip should be that light. He was right. I was using my arms way too much to counteract my legs, rather than focusing on a smoother, more balanced pedal stroke that didn't need counteracting. Once I was healed, it didn't take long for me to be rolling along for miles with mostly relaxed arms, with about a 30-degree bend at the elbows, and no arm fatigue at the end of long rides. That was several years ago, and I have had no such issues since.