See what a set of Campy Zondas will set you back. They are really an understated set of wheels that are faithful and durable. Not sure what your ultimate budget is, but if you will have one set of wheels then there is an argument to spend a wee bit more. Also check the options from Fulcrum. I would steer you to handbuilt wheels as breezerboy recommends, but I am not certain what access you have to competent wheel builders in your area (or if you service your own wheels.)
I'll take a look at the the Zondas. Thank you. Currently I have a set of 404 tubulars on the bike. The other set will go on for the occasional slow casual ride with the girlfriend. I can deal with the irritation of having to swap out brake pads. I'd built a set of Chris King Classic/Aerohead/Aerolite 32 spoke wheels before that I loved. I'd prefer to keep the budget a bit lower than that for this purpose.
A set of Campy Neutrons popped up locally for a pretty low price that is intriguing as well.