Another vote on Williams System 30s. I've had my set for over 2 years now and they still roll round and true. Even with me pushing the upper weight limit (I really should have gotten the 30x's) the wheels have not needed any adjusting. Keith is a sponsor of my team and has given us great support. He's even taken feedback from us and adjusted his designs because of it. As for aero vs weight, Keith's theory is that you're going to spend more time on the flats approaching climbs and on the descents and that an aero wheel would be more beneficial in saving energy in these situations and then you arrive at the climbs "fresher" and have more energy. He believes that this extra energy more than compensates for the weight difference to a "climbing" wheel. YMMV