BTW, I have had the SFXn and it's a very loud camera. With the AA grip the grip is very good, but it comes (as does SuperA) from an era when Pentax tried strange control ergonomics - buttons and such (nearly everybody did, the worst culprit was Minolta - their cameras from the early AF era are an ergonomic nightmare). It is quite usable with good viewfinder (for an AF body). But the sound of its motor drive is _louder_ than Eos 1V...
I think a good working SuperA would be a better option. With it you can still put the motordrive off, and I think the MD offers 3-3.5fps unlike 2fps of the SFXn. Frantisek