Felt B12 or Planet X Dura Ace

Looking at biting the bullet and finally investing in a tt bike having made great use out of my felt road bike for some time now and am torn between the following two. Having done some research on various websites there seems to be differing degrees of though on the two bikes below. I am looking at going for either the 2011 Felt B12 or the Planet X Pro Carbon Dura Ace. Just looking for advice from those of you that know more that I do on the specs and what you feel is better value for money. The specs are as follows:

Felt B12

Frame: Felt Aero TT/Tri UHC Performance MMC Carbon Fiber Frame w/ 3KP Finish. Full Aero Tubeset w/ Front & Rear wheel recesses, Internal Cable Routing, Forged horizontal dropouts

Fork: Felt Aero UHC Performance TT/Tri Carbon Fiber Fork w/ 3KP Weave; 7005 Aluminum 1 Steerer tube, Carbon Fiber Crown, Blades, and Dropouts, 434g

Drivetrain: SRAM R2C Double Tap bar End Shifter, SRAM brake Levers, Red braze on Front derailleur, Red Rear derailleur, SRAM GXP crankset w/ RED TT 53/39t chainrings, SRAM 10 speed chain w/ PowerLock, OG-1070 11-26T cassette

Components: SRAM Dual Pivot Front, SuperLight dual pivot Rear brake w/ Cartridge brake shoes, Stainless hardware & Teflon bushings, Felt Bayonet 6061 T6 base bar w/ integrated Adjustable Length 7005 Aluminum Bend Tri-position extensions & Aluminum arm rests w/ gel arm rest pads, Felt SL 6061 Aluminum 3D Forged stem, Felt Aero UHC Advanced Carbon Fiber Standard Offset Bladed Monocoque seatpost, Felt SL Tri/TT saddle w/ Carbon injected base, gel Nose, custom waterproof cover w/ Cr-Mo rails

Wheelset: Felt TTR-3 700c 40mm deep Aluminum w/ CNC machined braking surface, 20H Front/24H Rear w/ Aero Bladed w/ Aluminum nipples

Planet X

Spec here through link to their website

Both bikes are in and around the same price. Any thoughts would be appreciated.