you could have a shop build wheels for you using the parts you want. it'll end up costing around $300-$600 depending on what parts you choose. it could concievably be less, say if you used surly hubs and cxp21 rims...but i'd say the base price for a wheelset that would last should be around $300. you'd be hard pressed to build new wheels for less, unless you have a magical bike part machine that makes parts out of thin air.
you don't, do you? cause i could use a few things...
wheel building is fun. read a few articles on it first and find someone who knows how to check your work as you go along. lacing it is the easy part, tensioning is where it gets tricky. but it's not as hard as everyone thinks it is, and like gally99 said, if you screw it up, you can get someone to fix0r it.