I think 2 grand for the Duo and $2500 for the Quad is a tad steep.
There's a few things here dac, now that youve witnessed the quality of some top notch nearfields what d/a will you use ? An alternative is to get active nearfields with a digital interface but if not you need to match your signal chains up to par with quality. You dont setup focals with an m-audio interface
or a u87 to a $200 preamp. If you grade up to serious stuff, grade up everyting, mogami and neutrik the lot.
Now for the price, subtract the price for a quad and youre left with the cost for the i/o. As of now there isnt much info/specs on the i/o and its not going to be 2192 so i dont know to what UA interface you can refer to. They've been working on the apollo for 3 years so i assume its build from scratch. I think the preamps will be okayish, you have to consider that discrete builds do not fit a 1u enclosure so the line drivers ad/da is what will make or break the apollo. UA aims at mastering grade i/o but thats OEM talk and will be determined on the first shootouts with rme ufx, metric halo and the lot. Digital i/o i wont put in account much since adat=adat, a 1 on 1 transfer with no conversion.
Its a smart way for UA to promote UAD even more presenting this set solution. High end users will not buy into it but people moving up from their budget setups looking to incorperate UAD plugs will find much appeal.