Got new tires for the stock 15" wheels. They are Yokohama AVID TRZ's. They feel so much more stable than the GY Integrities. There's now around 400 miles on them, and the mpg is hovering around 45-46...compared to my 48 average on the Integrities. Considering they're brand new and not quite broken-in, not a bad mpg loss. Also, the TPMS came on when they were inflated to 36, but went off after driving for about 10 mins. So I increased tire pressure to 38 all around.
Tires from TireRack = $295 (includes shipping) Installed at local tire shop (Kim's Tire in San Jose)= $50 Total: $345 Then I got a 4-wheel alignment (Kim's Tire)for $50. Kim's Tire use the latest HUNTER equipment for tire installation/balancing, and wheel alignment.