I've been running the Kumho Ecsta STX and have been exceptionally pleased with them. They're the quietest tire I've ever ridden and have outstanding grip and ride. Got 'em from Tire Rack for $101 each. These are street performance tires, so I picked up an inexpensive set of Nissan 15" alloys for some offroad tires when the crawlin' mood strikes. I can fit all my gear, the offroad tires and a scuba tank for running an impact wrench in the back of the VX.
Oops, forgot the size: 255-55/18