Yeah.. The Nailboms sound good to.. Hard to chose.. :) I'll try to email the BK guys :lol:
I am pretty sure the decision is simple. Look at it this way....
Rebel Yell: they're brighter and pinch really well even at lower gain settings. They will do classic rock great but may sound a little bit more 80s due to their brightness (which is perfectly fine by me). Also when playing with a band or even another guitarist, they really do sound as equally huge as when you're playing alone, I can tell you that from experience.
Nailbomb: From what I've been able to gather they are meaner and they aren't as bright so you need a little more gain to get the same screaming characteristics out of them. I have a Nailbomb bridge coming to me in a few weeks (just ordered yesterday) so I can tell you how that works out.
What it comes down to is both pickups do hard rock great. The Nailbomb is more hard rock and heavier, and the Rebel Yell is more up to hard rock. That said, I've heard some Nailbomb clean clips that sound pretty damn good and I've played thrash acceptably on my Rebel Yells too.
I think a Slow Hand would be a good middle pickup with Rebel Yells too.