Well it’s not my FAVORITE controller, but it’s near the top of the list haha 
Unless you absolutely have to have 4 decks running simultaneously, an audio 6 is fine. I actually combine Deck C (Remix Deck) and Deck D leaving a channel free on the mixer.
Nah i know what would happen with that. End up being annoyed by only 3 channels when i could have had 4. May as well go 4 channel straight up.
fair enough 
second hand audio 8 may be your best bet. why the hell these were discontinued is beyond me.