My vote is half and half. You could probably get some good exhaust work and wheels and tires for that amount of $$.
Unless you auto cross or something like that you'd probably appreciate the combination of looks and go more so than just go. The only reason I say that is because most go mods only give a marginal increase in go...unless you're talking super charger or NOS which could decrease engine life.
Good luck with whatever you choose.
$.02
PS:
Looking good Roger.
