the ESP has EMG pickups, which will fit your style of music, however, the jackson has the floyd rose in it, which will be very useful in your metal endeavors.
if i HAD to pick, i would choose the jackson.
there was only so long i could go without a floating bridge, although not everybody finds it necessary.
Also, im not a fan of active EMG pickups. due to being active they suck all the tone from your' guitar and leave you with something very generic that, well sounds like everybody else. To me they feel a bit more digital with little feeling in them. you can always stick new pups in the jackson. (or the esp for that matter), but think of it this way, it easier to switch the pickups in the jackson, than it is to stick a floyd rose in the ESP
(having said this, im not a fan of crazy guitar shapes so the kelly isn't for me! but alot of people like them)
i hope that helps, but also, being an ibanez forum it has to be said:
>>>Get neither and buy an RG or a JEM