I'm not a huge Trek fan, but the Radio Shack Madones look very cool. For pure aesthetics alone they are one of my favorite bikes in the pro peleton. This is Jason McCartney's ride parked in front of the Shack bus. I dig the bear graphic on the bus, and it is also one the bikes, at the top of the seat tube.
One of the newest and sexiest bikes of the pro peleton is the Specialized Venge. HTC was rocking them for the first time in the U.S. They are done up in a matte black finish that looks super stealthy.
BMC is a company that doesn't really excite me as far as bike design is concerned, but like Radio Shack, BMC really does have a great look. From their kits, to their bikes to their team cars (above), I love the way they roll.
I could go on for a long time raving about all of the great bikes from this years Tour of California but I'll hold myself back. However, one bike that has to make it in is the Focus Izalco of Team Jelly Belly. They might not be a Pro Tour team, but they sure do ride Pro Tour quality bikes. The paint job of course just seals the deal for me. I love it!