To answer your questions.
Emg's may or may not sound good in an Ibanez or any other guitar if you don't like the tone. It's really just a matter of preference. I've had to install an 81/85 set for a guy once in a cheap plywood semi-hollow guitar and it still didn't sound much different than in any other guitar.
You can easily have two seperate volumes for the bridge/neck pickups and not have a tone pot. Just wire the pickups into your volumes, then from your volumes to your switch and finally coming out of your switch to the output jack. Look up the
wiring diagram for the zakk wylde set but replace the Les Paul
toggle switch with your switch. (oh yeah, and disregard the tone pots in the diagram)