I bought a $850 used CAAD 10 as a backup / trainer with sram red, and I'll be damned if it doesn't handle better than the $4000 carbon bike I've been riding. Outside of being a little rougher on chipseal, it feels less twitchy in corners and more solid when you drop the hammer in the straight sections. Wondering if I should sell this carbon bike and buy a CAAD12 or 13 as the race bike...