I currently own two Ibanez models, a Jem and a Prestige and I used a cheap ass EX model before that. My advice as a bona fide Ibanez user is to go with whichever axe feels the nicest and then change the pickups and get a guitar tech to do the set up for you. Ibanez stock pups are horrible, even in a Prestige. If you really like the feel of your current axe then think about getting it fitted with Dimarzio Breeds or Evolutions and you simply can't go wrong. Personally, I wouldnt go mixing and matching different brands of pickups. If you go for Evo's, then go for the straight set. Reason being, a lot of research would have been done by Dimarzio to get the exact combination for the best sound. Only thing you need to look into before you decide to change the pups on your existing axe as opposed to buying a newer one is whether the frets are worn and whether there are any intonation problems that can't be fixed through truss rod adjustment.
Evolutions are great pickups, very clear and powerful BUT I find Breeds create a sound that not many other guitarists use - both are traditional Vai pups but my vote goes with the Breeds.