Agreed. I did some pickup swapping on my Strat and it was not fun. Good results, but not my idea of an entertaining evening! So I would undoubtedly let my favorite luthier do any mods on the Ibanez. I'll research the DiMarzios, I've had good luck with their Tone Zone (middle slot) on my Strat, so the PAF's are worth looking into!
Are they a hotter pickup? Or not so hot? I am thinking I would like a not so hot pickup, cuz I prefer to let the amp do the signal boosting, that way I can play the pots' range more as I jam. If the pickups are too hot to begin with, it seems like the usable range of the volume and tone knobs is decreased. I'm thinking about avoiding any ear piercing highs and any annoying fuzz when the knobs are maxed out. Hard to explain, but I seem to prefer a mellower signal level on the way in to the amp.