Your definition of "nice looking, affordable" might be different than mine, but I think some good bang for the buck bikes out there right now are the Felt B14 at $2200 for a carbon fiber bike with a mixed Ultegra-level groupset, the Giant Trinity/Liv Avow (featured on the ST front page now), and the Cannondale Slice. You're getting an 11-speed 105 level groupset with the Giant, Liv, or Cannondale for under $2,000.
Are any of these the fastest bikes on the planet? No, but they all manage to be pretty good at getting the low-hanging fruit (except for that front brake cable on the Giant/Liv). The Giant front end is a bit limited for adjustments, though. I'm not a big fan of the Vision bars on the Cannondale, either.
The PRthree from Quintana Roo impresses me for the money. At $2500, it has a lot of nice trickle-down stuff from the PRsix happening, and they come with shorter than average cranks and a good, adjustable Profile Design cockpit.
Travis Rassat
Vector Cycle Works Noblesville, IN
BikeFit Instructor | FMS | F.I.S.T. | IBFI
Toughman Triathlon Series Ambassador