Well, I decided to go for it. I've been rockin' on my SZ720 through my Mesa DC-3 for close to an hour. Overall very impressive given the cost.
If your particular (as many of us are) and have a taste for the high-end MIJ Ibanez guitars (as a lot of us do) then you'd probably agree that many parts on the guitar which could be replaced, should be (e.g. pickups, tuners and pots).
Indeed the guitar does come stock with JPM style 3-way switching (actually looks like the JPM switch), but the volume knobs aren't wired in parallel in the middle position so dropping either volume control kills the total signal.
I'm replacing the stock tuners with Grovers and the pup's with DiMarzios. Unfortunately I guessed wrong... the pickups are F-spaced so I'm gonna have to exchange those before I can swap 'em out.
I'm personally a fan of the JPM style 3-way so I'm going to leave the remaining electronics as-is for a while, although I like Darren's idea and may try that if I decide to upgrade or change any of the remaining electronics.
I'm lookin' forward to seeing how this baby sounds with the DiMarzios
Thanks to all who offered opinions!