Just changed out the neck and bridge pickups on a crappy old yamaha, I now need a middle pickup that will work well. The Neck is the Dimarzio PAF pro and the bridge is Dimarzio DP155 tone zone. I want a middle with sort of strat type tones but will have to be something with a bit of ooph to keep up with these humbuckers. Anything i need to looking out for? spec wise?
The ones i have my eye on are:

-Dimarzio Iscv2 Evolution Steve Vai
-Dimarzio DP188 pro track
-Dimarzio DP117 HS-3
-Seymour Duncan SSL-5