I was just talking yesterday about the Ibby S series. When I first played a few in the late 80s(or was it early 90s...its been so long! haha!) at a local music store, I always likes the S series and the R series (before Satch kinda sorta made a variation of the R series his own). The RG models were alright, but the JEM models seemed better.
Seeing your S series sure brings back fun memories.
I also like the MoJoe. Probably my fave of the Satch series of pickups.