I read an interview with the late amp/FX maker and SRV/Clapton associate Cesar Diaz once, where he said the best "woman tone" (I've always hated that term :roll: ) came from a bridge humbucker with the tone rolled down. :?
I think Clapton says he used the neck pickup, though, and it sounds best to me with a neck humbucker.
If you did decide to get a humbucker for your Strat, I'd go with something vintage output if that kind of tone's important. It's not the same with higher-output pickups. Mule probably?
Or you could stick with single-coils and maybe get an active mid-boost circuit like the Clapton Strat.