I had the exact opposite experience with the SDS-1, but that comes with a disclaimer. I set up my MiM Strat with a Blaster first, and then added an SDS-1 in the neck and bridge positions and a Scott Walker Super 2 "single coil" in the middle. The stock pickups in the Strat were so noisy that the SDS-1's sounded SILENT in comparison, even with the Blaster.
I had a local shop do the work (my soldering iron sucks and I have never redone the electronics on a guitar, minus installing the Blaster) and they mucked it up so badly I sent the guitar to Andrew Olson for repairs (it was really bad; Andrew said it was one of the the worst set ups he had ever seen). The neck needed to be reset anyway, and he is adding an OBEL and doing a couple other neat-o little things).
Scott Walker is currently putting together a "single coil" Super Distortion for me which is going to replace the SDS-1 in the bridge. The project should sound pretty good when it's done. Best of luck with yours - sounds like you are almost there!!!
edit: I do not like positions 2 and 4 either and never use them.