welcome to the board
you will get lots of advice here ... most of it very good ... if you tell us what you dont like about the pickups you have now, we can help you get your desired tone more easily ... also, does that guitar have a fixed bridge or a trem? also, does it have a 5-way switch? and does it have a push/pull pot or mini-toggle for coil splitting?
i have modded an ibanez 540s with that pickup configuration (H-S-H) ... i always thought the stock pickups were too 'thin' sounding with not enough mids, and the highs could be kinda screetchy ... i used a 4-wire 59 neck, a duckbucker middle, and a C5 bridge ... if i had to do it all over again, i would use a vintage rails in the middle instead of the duck ... i like the C5 alot, but am tempted to try a custom custom (CC) ... these really warmed up the guitar and tamed the screetch out of the highs
for the kind of music you mention, i bet you'd like an Alnico II Pro neck, a vintage rails in the middle, and a CC bridge
other good choices might include a pearly gates set (for both the bridge and neck) or a '59 set (for both the bridge and neck)
be sure to get a trem spaced bridge model if you have a trem on that guitar
hope this helps
t4d