The Roubaix uses the lowest grade carbon materials (not that it's bad.) Not to mention their groupset is...not the greatest.
BMC makes solid framesets although most of their bikes are now carbon, that particular model on backcountry.com was specifically made to BMCs specifications. That and it has a 105 groupset. I would have pulled the trigger on that bike if it weren't for the deal on the Guru Flite.
I might just get it for my bike in LA.