Need some help for my guitar pickups?

i need some preferences for my guitar pickups. I have a LTD guitar with locking nuts and a floyd rose special bridge so i like to play alot of stuff that requires dive bombs and steve vai stuff. I already have a DiMarzio Evolution bridge pickup and i have no intention on switching that one out. but my middle and neck pickups suck! they dont sound full or hot at all. both the middle and neck pickups are single coil and i need to find some pickups that will give me something close to the sustain and scream that the evoultions give me. I want the pickups to sound like hot like metal pickups should and give really rich harmonics for the dives. i prefer the pickups to be more for solos, but also sound good for rhythm. got any ideas?