Reply to Xone 92 + audio 6 + 2 kontrol x1

I'm moving my setup towards a mixer + x1 setup. Because I've become so interested in mixing trance and techno/tech house I'm really itching for the 4-band eq option on the xone 92. With the 92 + an audio 6, would i be able to play/record at least 3 decks? 4 decks is probably overkill but I'd like to do at least 3. Also, is there any huge benefit from getting an audio 6 instead of an audio 8? The reason I ask is because audio 8's are really easy to find cheap, used on ebay.