If you want those squeeling harmonics I would recommend an Evolution in the bridge instead of the ToneZone.
The ToneZone I fit in my Charvel is perfect for my style (very fast, very precise picking (big Paul Gilbert fan)), but not so great on the harmonics side. I've played a few Jems with Evolutions in and they give a very similer sound to the ToneZone, with more sustain and harmonics allover the fretboard (although that's what the Jems are made for ).
The other two sound good though, I actually went for two Seymour Duncans in the SS spaces of my HSS Charvel, combined with the ToneZone at the bridge.