If you are a Costco member you might want to check their tire prices. They carry Bridgestone, Michelin, and BF Goodrich (I am not sure if they sell the S0-3's, but they can get most stuff on special order). I recently bought some RE730's for a decent price at Costco. I don't know if they have any special deals running right now (about 2 months ago they had $50 off Bridgestone tires), but their prices are competitive nonetheless. Prices include a warranty and mounting fees are less than $10 a tire. I got a set of RE730's in the 205/55/ZR 16 size mounted and out the door (tax, etc.) for about $430 nearly 2 months ago.
info here:
My RE730 deal Costco may not have what you are looking for, but its worth a try to check.
Good luck!
