Re: Mesa F-50 combo vs. Marshall MF-350 Mode 4 head
Brad used Mesa Triple Rectos on the first two albums, and he used an assortment of amps (Plexis, Twin Reverbs, AC30s, a few weird amps) on their latest album. Live, he uses a Randall MTS series head with a bunch of custom made modules to replicate the vintage amps. Guitars, he used to use Ibanez RGs live (along with some PRS guitars), but in the studio like the PRS more. I know for a fact all 7 string LP songs were Ibanez. Now, he uses the PRS, some strats, and some other fenders (mustangs, teles, etc).
And as far as the amp choice goes, i haven't tried either amps, but people say the F-50s aren't good for total brutal numetal distortion. So, i'd say look into a Mesa Recto if you wanna cop a NuMetal sound. Or the MF350. I know a bunch of numetal bands used it (i know Spineshank used them while they were still around).