RiffRaff, Emerald, Rebel Yell. All alnico V.
Other than the Rebel Yell (which i've already had) these are all pickups i've considered at one time.
Riff Raff - Great pickup! Needed something just the slightest bit hotter, but knew Tim could not physically fit any more wire in. The pickup i did go with (non BKP) is essentially a RR, plus more aggression, plus more output.... and it's on it's way now.
Emerald - Truth be told i have never heard a clip of these that sounded good to me. Official, youtube clips, anywhere... Trust me, i've looked. The output specs and EQ ratings look good to me, there's just never been anything that's convinced me it was the sound i'm after. This is something i trust - the Black Dog clips sold me a pickup that's stayed in my guitar for 4 years strong.
Sure, i could take a chance and try any of these... although the downtime involved is what kills me. I'm not in the UK, so going back and forth with these could mean weeks of having a pickup-less guitar... which isn't something i can endure currently. Wrong or right, when a BKP enters my guitar i know what's going on.... there's been 3 or 4 that went in and left within a day, and a couple that haven't changed in 4 years. It pays off to be concise towards a goal in such an exploration.
Maybe AIV is not the magnet for agressiveness.
Exactly the input i'm searching for with this query. Is it not!?!! Because goddamnit that would be cool to have the best of both voicings.... Mids and more mids. Midageddon.