As bad ass as the Cooper is if you want to ride and not spend a ton of time hunting for parts wrenching etc I would highly recommend the Felt. If there is anyway you can swing it keep the Cooper as a project and build it as the parts come along at the right price. If you can do only one I really have to go with the Felt, they ride so nice. I have a Felt Z4 and as much as I love my old steel bikes at the end of the day I will choose the Felt for any ride over 40 miles hands down.