I don't mean to redirect the topic, but it might as well be asked: if you're going to be doing field sprints, why not go with a 303FC? They're incredibly durable, and more aero than the 202. Plus, they weigh in nicely at 1198g. Just a thought.
I Like the lower profile wheels and would love to have a set of Zipp 303 firecrest tubulars but heres the problem, Unless i have a set of clinchers and a set of tubulars I will have to readjust the brake cables everytime Im ready to race or if i flat In a race. I keep hearing to fit these things you have to actually redjust the actual brake cable. No time if you flat in a road race. At least with the Zipp 202s I wouldnt have to adjust the actual brake cable between training and racing or flatting in a race other than turning the adjuster and switching pads. 2 sets of zipp 303s are just 2 expensive.
In all serious I keep hearing that sprinting on the zipp 202s the wheel just flexes so much, i dont know how true that is as Ive never rode them but I love the low profile of them at 32mm. I weight 149lb if that helps at all.