You got pretty good mileage out of those OEM tires. I bought a set of Potenza S-04's to replace the stock RE050As. The new ones are quieter and perform well, as well as having better wet handling ratings and better wear ratings. I think that the Pilot Super Sports are at the top of the heap. I didn't get them because they're $1200/set compared to $800 set for the S04s. I don't know where the Hankooks V12s fall. I've heard good things and bad things about the Hankook tires (my son is a service tech for GM).