Try
www.tirerack.com too. They were great when I had to replace my two rear tires. I got 4 (because they were so cheap & kept the two good ones as backup)Kumho tires for 39.00 each and paid an extra (optional) 6.00 each for a warranty on the tires that covers flats (up to 50.00 per tire to fix them!) for the life of the tire among other things.
The shipping was 33.00 via UPS and I found a local installer that charged 10.00 per tire to mount and balance them. The site has a list of local installers that you can contact. The tires were an excellent deal....I called a few tire companies who wanted about 100.00 more than I ended up paying including the shipping!
The best thing is that they have a forum where buyers give a detailed review of their experience with tire rack and more importantly how their tires are holding up. Personally, I had never heard of Kumho tires until I read these reviews and also read the ones on epinions.com to get another set of opinions. They were all excellent reviews! I plan on buying tires this way from now on.
One lesson that I got out of this: Be sure to rotate your tires during every oil change!!