After watching the Noss videos I have to say the INFI FFBM seemed a lot tougher than the Sr-77 DF. Not that the DF didn't take devestating abuse pretty well, but I think the FFBM easily out-classed it(as it should around 2 or 3 times the price). I don't have anything in M-INFI because the prices are almost up with INFI now so I'd rather just pay a little more and get the full throttle INFI. I'd buy just about anything in INFI/Res-C combo. Not holding my breath on that one though.