All the purists go for the original, and I can respect that..but for me this was the one to watch-- had the classic lines, the very cool villian (and his dopey sidekick), they gave Moranis more to do (Granted he was much more amusing to watch as Vince the dog), and it was cool to see the progression of these guys after saving the city and getting blacklisted as frauds.
Aykroyd,Murray,Ramis--all in their prime at this point.
Great flick.