I have unpotted AII SM's in a 335 and they sound great. I also have an AIV as the neck pickup with a Riff Raff in a Les Paul, and it is a brilliant combination.
However, I just got the new PG set (which is based on the SM set), and put it in my goldtop, and if you are into old Fleetwood Mac and Gary Moore sounds, then this set nails it perfectly. The sound with both pickups is almost Fender, it is that good. If you do get them though, remember that the neck pickup needs to be reversed (screws away from fingerboard), just like Peter Green's.