i agree that the stock VX has plenty of power, however, if you ask dub he will easily inform you that his VX really isnt much more powerful then it was stock (with current supercharger)....however with the heavy 33" nitto mud grapplers he's running and probably well over 500lbs in interior addition/modifications, he needs the extra power just to keep it moving...
also, dub is definately towards the wheeling side, but he does use his VX to tow a trailer, so consider the extra weight of that also...
from what i understand this is why he has a supercharger, (well i guess it sounds great and makes it fun to drive also).....
so, i dont know about other people with superchargers but dub does have his for offroad application....(hopefully im not making incorrect assumptions)