There's also Spec, though i have no xperience with them
As we talked about at Inters the Sachs uprated SMF solution doesn't seem to be the best out there for our cars, so i could be tempted by the fx400 that you mentioned.
SMF vesus DMF. With the torque our cars produce and how we use the cars i don't think that a DMF will last long, as it's built with comfort in mind and not hard use and with the price for one i think it will be very expensive running them on cars modded to our levels. I don't know of any upgraded DMF solutions so only OEM available.