I'm a discount tire fan to be honest. I was able to receive a military discount in conjunction with the rebate for the tires (Had to talk to the regional manager on that one, but it all worked flawlessly in the end). I was in the shop for about 30-40 minutes while I chatted with the staff. Tires were installed after the time lapsed and no damage was done to the vehicle or the rims, and tires were filled to the correct pressure.
All in all, I priced both Discount Tire and Tire Rack when I went to get new wheels a year or so ago. Tire Rack has to ship them to a shop and then make an appointment for you to go there and get it installed. Discount Tire owns their shops and you get an idea of the inventory right online. In the end, if something goes wrong, I'd rather deal with one company delivering my service and tires at a great price, not two separate entities.
Also, I agree with the posts bout getting cheaper tires. I got the second cheapest tire available (I believe) and they are wearing excellently thus far, have great traction, and aren't any worse than my OEM tires in terms of road noise. Supposedly they will last for about 50,000 miles, which equates to about 5 or 6 years of driving for me. By that time, I'll either replace the tires due to them being worn down after that amount of time being used, or get rid of the car. If you drive quite often, I'd spend the extra money and get tires that warrant a certain year/milage claim. Keep your receipts, get your alignments, and you'll be golden.