If you have the patience - DIY
NASA - One more thing... I paid a professional $600 just to get my car WOT "safe" on a dyno after installing the supercharger.
Then I got it home and it sometimes died, threw codes, stumbled at part throttle, and got poor gas mileage. I'm not bashing my tuner at all because he made my car safe to flog and I didn't have a clue how to do it... I've managed to fix all those drivability problems myself, but it took 4 months of bust-ass research. Now I'm reading Banish's book and learning even more.
Ultimately, if you want to get the car to run right you'll have to do it yourself because there's little chance of getting a perfectly tuned vehicle for $600.