DiMarzio DP182 WH

OK then, that's one of the highest output SC sized humbuckers of Dimarzio's collection.

Fat and juicy distorted sounds, that's its bread and butter (the more distorted, the better).

Likewise, cleans it's not really what it's made for, it CAN do it as long as you back down the gain/volume of your amp/modeler etc. as long as you like the default voicing. Another way of taming it is to use a traditional all 250K pots on your strat (this will shave off some of the output and will mellow the mids/highs) and lower the pickup a lot. This way it will sound like a medium/high output full humbucker and the cleans will be very acceptable. Still, even in these scenario the volume difference between the Fast Track 2 and any traditional Fender signle coil will be massive, so yet another thing you should keep in mind.

If honest, I prefer the Tone Zone S instead which on paper it has a lower output but in my case the perceivable output of the latter is higher. That's probably because of the more mids of the Tone Zone S whose factory voicing I like more but keep in mind that this is a matter of personal preference.

It's little brother, the Fast Track 1, is an excellent companion at the neck position (I suspect it sould be great for the middle position as well but I haven't tried it).