Blueskycycling.com has in its weekly specials an insanely good deal if you're on a budget: the great deore/rhynolite budget wheelset and a pair of hayes mx-1 mech. disc brakes, all for $160! While the brakes aren't quite avid mechs, they are pretty good, and the wheelset is terrific. Bombproof, but a little heavy. If you're doing some budget upgrade, I'd hop all over this.