Porsche is a beast. If I had to drop my car I'd grab a 997.2 like your buddy's. I could be wrong but I'm pretty sure your can mod that car pretty good without even upgrading the trans and engine because they are bulletproof. On the gtr if you want to upgrade the turbos it's very wise to upgrade the engine and trans which is costly. Switzer performance in Ohio is great with the Porsche platform. The only thing I don't like about Porsche is all the expensive options that add up to a GT-R once you option the car out.