A. I have RWRP, and find that positions 2 and 4 are two of the sweetest tones I've heard anywhere. I think I'll always stick with RWRP now.
B. There's alot of talk around this subject, with alot of people saying that staggered poles don't work well with a flatter fretboard radius. My Apaches are staggered as when I first got them I had a 7.25" radius strat neck. I then moved up to a compound 10-16" radius Warmoth neck, and can tell no difference whatsoever. I emailed Tim with regard to this and he assured me the staggered pickups would be fine with the compound radius, and they were. That said, if you have a very flat radius all over, I can't see how a set of flat poles would be bad.
Hope that helps.