http://www.guitarnuts.com/wiring/serpar.php
http://www.guitarnuts.com/wiring/sw3.php
Diggidy,
We can't pick a pick up for you Sorry, couldn't resist. But there are too many variables, your ear being one of them, your attack, your amp, the cycle of the moon . . .
Happily, there's also a lot of amount of overlap among the different humbuckers, despite what the marketing people want you to believe, so if you pick a decent HB in the "tonal area" your looking for, you'll do OK. Play a bunch of guitars with bridge position HBs, and see what you like. I'd try to do that with an amp comparable to what you'll be using, because the amps gain and sensitivity will matter. I can overdrive the little 1/2W tube amp I built for my daughter with my Gold Lace Sensors at 4 and the amp gain at 4 or 5, so the PUP and the amp both matter here.
I still strongly suggest you keep two of you SCs and just buy the HB. You haven't hated those SCs, so live with them a bit longer. Wire the HB up with a Series / Parallel switch, and see what you think. You may find that the HB plus the parallel wired HB in series with a SC, or some other combination gives you all the tones you want right now. And if it doesn't, you'll know what tones you still want and can choose your middle or neck pup to get them.
Does that make sense?
Todd