That's a good question. Definitely a whipple or Magnuson is the way to go. Anyway, the most power will be had with the Mag but it is also intercooled so that's not a fair comparison. The Mag also uses new injectors/reprogrammed ecm to match fuel flow whereas the whipple uses piggy back ecm and injectors to get the job done. Problem is the intake was never designed to have fuel flow through it so it's not the best plan. The Mag also offers a warranty on all driveline components and the whipple only on the charger itself.
THe whipple is cheaper, easier to install and quieter though. The whipple coupled with the properly sized injectors and custom ecm program is quite a package but I am having a tough time deciding myself. While the added cost of the Mag is a deterrent the extended warranty is not. Dynotech Engineering and Lingenfelter are less than 3 hours from me. DTE uses the Whipple and Ling uses the Mag. Ling is about $1500 more.....
If I get one I'm getting a personalized plate
BLOWN H2
Joe