Spend all your money on a pre-built super car that is only going to scream "I have Money" or spend a smart amount of money on a tuner car and build the biatch up. You'll dust the ferarris and porsches and I'll respect you for building your own ride.
$250,000 on a fast car
or
$35,000 on not so fast car, + $20,000 in engine, tranny, turbo, suspension, etc mods and you have a super fast car.
But that's just my broke man's opinion.
