From my personal experience, I'd say Jackson. I recently bought an Ibanez JS-100, and I had to take it back because it was of poor worksmanship. Apparantly Ibanez just puts a bunch of cheap parts on the guitar, write Joe Satriani's name on it and sell it for $600. I returned the Ibanez and bought a Jackson DKMG, and I'm infinitely more happy with the Jackson (and I'm sure it can shred just as fast as an Ibanez). But then again, I've got a friend who owns one of the Ibanez RG series and he's more than happy with it. Just go to guitar center and play em all. Go with whichever feels most natural to you, be it a Jackson, Ibanez, or even a Fender.