The Tektro 521 AG brakes, which will also work, run about $50 a pair.
To save some more money, you could always use a downtube shifter for the front derailleur. You'd still have to come up with a brake lever. Your bike shop might cut you a deal on some used ones.
You could drop down to the Tiagra level for shifter and save a few bucks too.
I don't think that wheels are a place to skimp. I'd rather have a good quality pair, even if they are used. I have a Gunnar Sport and put on some used 1st generation Ksyriums wheels on that I paid $200 for.