Mosfet mist?

Mustagefan, yes. This was more of a problem during the lateral MOSFET period. These days you see more of the vertical MOSFETs. I think what has happened is that in the old days designers did not always take the input capacitance of the devices into account. Experience is always helpful though so the issue is less common with modern designs.

Atmasphere if you were to make a tube hybrid amp would you pick Mosfets or Bipolars for the output stage.

I've been studying that very question for the last year or so. There are advantages to each, but in my case I think I would go with the MOSFETs for the additional linearity- I like to run things zero feedback.

I think you are right and a hybrid tube amp would be a good idea for home theater. It would have no output transformers which you like. So lets get cracking.

I personally like the more tube like sonic signature of mosfets vs bipolars. I recently acquired a Counterpoint SA100 rebuilt by Greenstreet Audio with Exicon mosfets and with some tweaking and replacing of the coupling caps @ the tube gain stage I'd say there's hardly any mist I could detect and all there is is music.
I currently own Vac Phi 70 mono, Counterpoint Altavista NP220PG, NP100PG, and some heavily modded/rebuilt tube amps.
Mosfet amps are given a bum-rap by designers not going all out to do them justice by using up to par components in the gain and driver stage. Fix all the problems upstream and use modern mosfets that are less lossy and you wont need to burn money with power tubes (esp. those Sovteks passed off as so-called whatever brand reissues)