ORIGINAL: Axel
I think it would depend on which way is cheaper. With the gas guzzling tax on it and whatever else may bump it up to an outrageous price, I may just go with a supercharger if it's cheaper. More bang for the buck, and I'm sure they already have them out on the 5.7 so there would be no wait.....hopefully, though designs may have to change for whatever reason.
Be careful with a supercharger. It will void your new car warranty and some guys are reporting that the 5.7 engine can only tolerate 2 lbs of boost before encountering major problems. Basically, it is not beefed up enough, internally, to handle the added stress.