Nirvana or STP?

I prefer the STI, being a Subaru fan

The stock tires on my XT were bald after 10,000 miles, which essentially has a de-tuned version of the STi engine - I'd hate the bill for the 18" tires every 6,000 or so on the STi :p but I'd put up with it (If I didn't need the wagon) for that sweet 6-spd transmission

Of course, I replaced them with Nokians, which are barely showing any wear after 25,000 more...