EDIT: Fourth Feline beat me to it on MQs, but I haven't got time to rewrite it al!! :D
To add something else to the pot... Have you ever wondered about getting Mississipi Queens at any point? If you have, then this might be the guitar to put them in.
I had Riff Raffs in my Epi SG, they did exactly what I was expecting, I feel they have a slightly tighter sound than my Mules, and I don't think I'd personally bother trying my Mules in all mahogany. Then I "tried the RRs out" in my Explorer - and they ARE NOT MOVING from that guitar (so I know exactly what you mean on your VHIIs! :D).
That freed me up to try the MQs in the SG. My reasoning was "Pete Townsend had P90s in his SGs" and I wanted to know what P90 types were like anyway.
I'm very happy with them. If anything, I'd say they are more powerful than the Riff Raffs and Mules. Nothing scientific here, it's just that with guitar volume on full they drive my amp models - and my valve amp - harder than
any of my other guitars.
They are
very sensitive to pick attack and volume controls - if I was playing live, I wouldn't need any stompbox/whatever to switch between clean/crunch/lead.
A possible drawback that Philly will point out

is that the bridge MQ doesn't quite get you a bridge humbucker tone for crunchy chord riffing - but for my purposes it is
very close, a lot closer than I imagined it would be.
Apart from the fact that I need to sort the bridge and its saddles out on this particular guitar, and that I've acquired too many guitars/pups in a short space of time, my MQ'd SG would be getting a lot of attention - it's a very versatile guitar now.
If, however, you don't have a subconscious desire to try P90-style at some point - then disregard all the above! :lol: