Clay, if you're in the twin cities area, I have about a dozen friends with tire changers nearby. They change tires for beer and the hilarity of watching someone new try their hand at it. The only specialized tool is the 19mm allen socket for the front axle, which you are welcome to borrow from me. :thumbup:
Otherwise, Simply Sportbikes in Eden Prairie and Midwest Cycle in S. Mpls have reasonable rates, more so if you bring in just the wheels, rather than the entire bike. Midwest does add a charge if you don't buy the tire from them, which kinda sucks, since their prices aren't all that competitive.
Dennis Kirk has good prices and orders over $100 are shipped next-day for free. For what it is worth, I've been very happy with the Bridgestone BT023 which is typically a fair bit cheaper than the PR3 and PR2. 9300 miles on the last rear.