more than what car suits you the best (although that has to be taken in to account) parts availability has to be high when deciding what brand to choose. you dont want to always have to be ordering your parts because your LHS doesnt carry any of the brand that you bought. keep that in mind as well. i would head out to your local track and see if there are any guys out there that will let you drive theres around for a min so you can feel the differences. most guys will be more than wiling