Tons of choices to make regarding wheels: for longer rides, if you will be doing a lot of climbing, you want lighter wheels. If you will be doing crits and racing in general, you may want something more aero (e.g, deeper rims, which are heavier than a wheelset built for climbing... just compare Zipp 404 to their 202), wheels that hold the speed well once you get them to spin. If you really get into racing, maybe tubulars might be in the cards. For use by average riders, a nice aluminum clincher wheelset that weighs somewhere between 1500-1600g is nice.