Have you tried a local tire shop to see what they can do? My dad is an independent tire dealer, it's ridiculous what some of these online sites are advertising tires for at "discount rates". He can beat them on price any day of the week. I bought some Firestones last year and he beat out Tire
Rack by almost $40 each. I know I was only paying cost, but even with mark up he would've still beat them. Go with a guy down the street and not some warehouse half way across the coutry.
Chris