My few week old Tiagra equipped CAAD9
The only things I've changed are:
Continental Supersonic tubes and Schwalbe Ultremo R-1 tyres (a saving of almost 400 grams)
110mm Deda Quattro Stem
Charge Spoon Ti Saddle
Would really like some of the Mavik Ksyrium's that Whiteline has on his CAAD9, as they look awesome on his bike.
Will have to see how many penny's I've got at the end of the month.