Whats wrong with the SP90-3b [bridge] ?For the music you play, I'd go with Duncan. That said, I won't recommend SP90-3b but medium output ones: SP90-3n or SP90-2n. Yes, put the neck version in the bridge position. I've used both. 90-3n has more low end (chuggy) and more aggressive, suitable for bright sounding guitar, while 90-2n has more high end (cutting in the mix) and more dynamic, suitable for warm sounding guitar.
If you don't play clean a lot and not after greater picking dynamic, then it's fine. Dirty territory is its forte. Excellent rock pickup.

Cool! Tell us your impression/review after you play it enough later.Just ordered the SD-P90-3b, should be here Monday.
