I think your best bet is to pick up some used deep dish wheels from e-bay or some local tri/bike racing listserve.  For about 800 bucks, there are wheels like the Rolf Prima and the Mavic Ksyriums - not carbon fiber but lovely wheels.

I love my Rolf Prima wheels on Felt B16.

For your budget you aren't going to get a new carbon wheelset. You may find some used for that amount. Depending on how many races you are planning on doing, renting can be a good option, especially to try some out. Your bike, Felt z85, is a road bike. If you are just doing triathlons, you may to spend money getting a triathlon fit which will include bars/extensions, as well as an aero helmet if you don't have one already. Those are the two biggest time savers in triathlon bike legs. Third is a set of aero wheels. You can certainly get lighter wheels depending on your size. I like Rol wheels http://www.rolwwww.rolwheels.com for quality and price.

Have fun.

BT