Just had a realisation!
For weeks I've been stressing - do I get a b3k or vmt and run it through something like a tone hammer, or just go straight for the b7k. Had a look at johnbegone's preamp shootout - utter legend by the way - but it didn't help as much as I'd hoped.
But then it dawned on me - I was worried that the b7k eq would only effect the distorted tone, but I'd be running the tonehammer behind the b3k/vmt in the chain anyway, so it would be basically the same.
I think the b7k might be the one for me