I also use the B7K as an almost clean pre. But it has such a killer drive, I wish I played music where I could use all that anger...Nice! Somehow i always use my B7K as an amlost clean pre... And forget how badass it actually is. I also prefer the B7K, mind sharing some settings also?
Anyway, the settings I used for the recording were:
Blend: 1:00
Level: 1:00
Drive: 1:00
Low: 12:00
Treble: 11:00
LoMids: 11:00
HiMids: 1:00
Grunt: Fat
Attack: Off
The eq would of course be different to sound right on your system. I think it gets the flavor well enough. Of course listening to the Muse track it sounds like there is some octave divider thing going on too. But I also played it with NO effects and it sounded pretty good that way too, especially if you play over or close to the fingerboard and let the strings bounce off the frets. And that's with flatwounds!