Had an Impreza TS, traded for a WRX, and last year finally bit the bullet for an STi. Love the car, but 16000 km and the REAR tires are showing a lot of wear. The fronts are great. Now, I don't drive like a maniac, but I'm mostly on dirt roads and back roads. To replace the factory tires (Bridgestone RE070's) looks to be pretty expensive, so I'm shopping for a high performance tire that's a little more durable. Suggestions?