So here is the deal: I just bought a 2004 ZX3, but it has 3 steel wheels and 1 alloy wheel. The front two tires are matching 205/65-15, wrong size. The rear two tires are different 195/60-15, correct size. The alloy is on the driver's side front tire.

My question: Should I get a steel wheel, and put matching rubber all the way around? or Should I just drive what I got till I can save money to get what I want (15" or 16" aftermarket wheels with matching rubber all the way around?
SIDE BAR: Am I doing damage by driving on the setup I have now?

Final question: Where is the best place to get tires and wheels in Colorado?

I would definitely get one more steel wheel and run the 195's all the way around. The 205's are 1.5" taller than the rear 195's. Best place to get wheels is the Tire Rack (http://www.tirerack.com/?affiliate=AD4) of course. We ship to Colorado. You could most likely find a steel wheel at a local salvage yard though.

I agree with Trevor, you should replace the one wheel and get a matched set of tires. If finances are an issue, you might want to look into a used take-off set (check Craig's list) or even Discount Tire stores for used tires. Peerless Tyre Stores in the Denver area carry steel wheels. If you've got the time visiting a salvage yard is the cheapest way to go. Some may even have a set of used tires.