I've never ridden a steel bike, so I can't comment on the steel versus CF. However, I did buy a Giant TCR C3 less than a month ago, and I love it! I now use it for me long weekend rides, and use my older Specialized Allez for commuting.

Mr. Sheesh has a TCR C1 and two days ago he bought a TCX, the Giant Cross version. He loves them both! I guess we're now a Giant family.