I ran Cooper CS4 195/65R18T's for my last set. while not LRR, they are have a UTQG 800 rating and a 80,000 warranty. I got 90K out of them. they have been replaced by CS5 now, all else remains the same. Ebay has the best price with free shipping.
http://www.google.com/aclk?sa=L&ai=C...%3D14978428809
these are less than 100 each.
I suggest getting T rated. it makes the diff of 20K miles.
I believe this is who I bought mine from:
http://www.google.com/aclk?sa=L&ai=C...%3D14978428809