I tried the caad8 and caad 9, And I went with the caad9 the top tube is a little larger and frame is stiffer, they are both great bikes. They really droped the price on the 8s and most stores have sold out of them. I Went into the bike store the other day and seen the new 2008 and they were really nice but priced about 400.00 more than my 2007.