Seeing as you bumped it...
Cannot comment on the Cocktail but after living with the Vault 2 for over 18 months I think i am fairly well qualified to talk about it.
Truly, 2TB? You are never going to fill it unless you have something like 20,000 cds you want to rip..
No it does not play cd,s but thats not what i bought it for, I wanted to rip em all, store them away and just access thought the hard drive.
But tbh, I use its streaming capability more than anything else as it does Tidal , Deezer and Spotify and Qubuz when it arrives.
Its weakness imho is its inbuilt DAC, its pretty weak and I output via spdif to a Mytek Brooklyn which also supports full Tidal MQA unfolding so I am looking at 24/192 on select albums. I do also use the toslink output to my second system in another room via a long cheap toslink cable, works well enough for me.
Touch wood, not one single issue in my ownership at all, it takes a wired internet connection only no wireless which as far as I am concerned helps avoid any streaming dropouts.
Was looking to upgrade but did not really see anything below $5k that was a significant improvement so I am staying with it for a while longer.