This is the one I bought and I had the same decision to make, and the same dollar amount you do.
http://www.bikesdirect.com/products/motobecane/fly_TeamTI_29_2010.htm
It's hard to beat with the component group and a Ti frame. It's well made and rides great.
http://www.bikesdirect.com/products/motobecane/fly_TeamTI_29_2010.htm
It's hard to beat with the component group and a Ti frame. It's well made and rides great.