EDIT: Brant - has the spec changed as I'm pretty sure the one I tried less than 2 months ago in Rotherham was 10 speed Ultegra and a downgraded c/set?? The RT57 had full 11 speed Ultegra.
Pro Carbon at £999 has full 6800 Ultegra 11, inc calipers, cassette, chain, crank. The lot. And FSA Vision 30 wheels which are fast as you like. Not Superlight, but I'd take aero over lightweight unless I was an 8 stone climber.