Felt AR1

Aero road frame from Felt, built up with SRAM Red and Soul wheels.  Looks fast.

Cervelo S2 / S3

Continuing with the aero frames, here are a couple of Cervelos that I find particularly good looking (and to be honest, I am not a big fan of Cervelo in general):

This one is a S2 with internal Shimano Di2 drivetrain, Zipp Vuma Quad cranks, and Easton EC90 Aero tubular wheels.

Here is a S3 with SRAM Red and Zipp 404 tubular wheels (the cable routing into the top tube still bugs me a bit, but that is nitpicking).

Boardman Air/9.8

Here is a carbon fiber aero frame from Boardman Bikes, the Air/9.8, built up with Shimano Dura Ace, Rotor 3D+ cranks with Aero Q-rings and Power2Max power-meter, and Enve Smart 6.7 tubular wheels.  The tan sidewall Vittoria tubular tires and the white bar tape are nice touches.