not played the fafner but if i were you id atleast give the aggie a go! there awesome amps really loud and well made, for me when i tested my old db750 againet the svt cl the cl just couldnt keep up! plus it weighs alot more the the db heads! also just to throw a curveball have you considered the ag500? very nice head if you dnt need the dual channels they do the ag500sc very nice loud head depending on what you plug into should be more than enough power? and saves the old back?
andy