Hello everyone, I am going for the Ironman Wisconsin in 9/2013 and planning on doing this for a long time. At the moment I have a Trek Aliph 1.5 and like it very much. I live in Florida and go to Chicago fairly often in the summers to do some training with my brother. So instead of taking my bike back and forth, I've decided to get another bike. This time, I want to get a TT bike and I've decided to get something good < $5K. I am stuck on 2 bikes and I will try to test them if the stores have them, but I can't decide between the Felt B12 and the Trek Speed Concept 7.8. Although money is not a serious issue for me, I don't want to spend needlessly. I will only get the more expensive, if it is better. I am somewhat new to the sport and don't understand much of the nuances of the the specs and I am not very familiar with the equipment as some of you seasoned pros. But I don't want to keep upgrading my bike every few years. I would rather get something very good now and stay with it. Please advice.