Well, to my ears the 5150 has a ton of gain, and a smooth, dry, bassy sound.
The MM would probably sharpen up the highs, liven it up a little, the bass of each would work very well together, and gain certainly wouldnt be a problem!
I think it would be a good combo. Something I imagine one might not like about a 5150/MM combo would be the mids: niether has a lot, so it would be naturally very scooped.
The sound I have in my head from trying to imagine it is leaning toward a brighter version of the black album. Thats a characature, but you know what I mean!
Which clip, mate?