the "RG-7" pickups are the DiMarzio "New 7" or B2 (bridge) / N2 (neck) pickups that were stock on the RG762Xs. these are really hot pickups that DiMarzio's techs compare to the Super Distortion models of their 6-string pickups. these are not the same as the stock 2027 / 742X pickups, the Ibanez-made V7-7 and V8-7, which many people don't like at all.
the Tone Zone 7 / Air Norton 7 is a good combo for articulate sounds, with most any level of gain. your J-Custom is mahogany with a maple cap, right? lots of people who find the TZ7 too dark are running it in RG2027s, which is just mahogany without the maple cap. in your case, the maple will brighten the sound a touch and the TZ7 i think would be a great choice.
running the AN7 in the bridge would definately give you a lower output, which would be great for jazzy or fusion kind of things, but if you ever wanted a little more power you'd have to get it from a pedal or from the amp. the Blaze sounds more compressed to me, with a scooped EQ curve and high end sizzle -- if you like medium-lower gain tones, i would definately put the Blaze and the Evo7, which has tons of mids, at the bottom of the list.
and don't kock the 5-way!
if you're willing to learn about complicated switches and coil cutting ideas, you can wire up some really cool schemes with a 5-way switch. but if the mccarty scheme works for you, by all means wire it up.