DH asked me to post asking for new bike suggestions for him as well. He has an older Trek 5000 carbon road bike and he wants to upgrade to a good carbon bike with ultegra or better components. He is not interested in anything too aggressive because he has some back issues and doesn't like to be too low (athough he wants to do TT's so he's definitely not looking for a 'comfort' bike either, lol).

He's looked at the Madone, and the Roubaix and the Tarmac, and now he's looking at some of the Cervelos as well. He hasn't ridden any of them yet, just looking and doing some research. Price range is $3000-4500. It'll probably be his last road bike so he's willing to pay for a good one.

Any other bike he should be considering?