Thanks everyone for the interest.
Cool. We'll see how cheap it'll be, group buying components will definitely help. If I make up build kits (which there does seem to be demand for?), I aim to provide two options, a no expense spared one and a more budget one. An idea I'm having just now is to use OPA134s instead of AD797s - saving there is £14 per board and the specs on the 134 look pretty decent. Anyone have any comments, I've never used the 134? It seems to be pin compatible apart from it lacks the compensation pin that the 797 has but that's easy to deal with.
hey there! I'm definitely interested in ~2 boards of the next/new charge... as I've seen on the wolfson website, you can order samples online. So probably this could become a decent and (relatively) low-priced DAC!