I needed to purchase a fast road bike. The CF or TI question was foremost in my mind.
Here is how I made that decision:
I have a friend who owns a busy LBS in Michigan. He is a Racer. MTB and Road. He is several levels above what I will ever be. He can afford to buy whatever he wants.
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I asked the question. He said that TI is like a spring and bounces for heavy guys like he is and I am.
I double checked with a guy on this forum called "jppe".
I bought a Trek Madone from this guy in Michigan. 400 miles away for a big discount price and never regretted it.
Oh, there is one regret: I should have bought Dura Ace but that is where I chickened out.