I think you have got your money on the right horse acmis but you are about 18 months too early.
Given that the current generation ADC & DAC SoCs are both excellent and inexpensive the logical next step is to only have DACs in loudspeakers and headphones and ADCs in microphones and pickups.
At the moment we tend to have a 'best' DAC and feed everything through that. It makes far more sense to keep everything in the digital realm as much as possible. So in the not too distant future what you are looking for will be commonplace.
For now though it's only for early adopters and priced accordingly. ADAM do a hi-fi version of their popular AX series with USB. They are called the Artist range and are priced to appeal to audiophiles.
All is not lost... perhaps. Berhinger have just announced a new USB range. £200 should get you a pair of these when they hit the shops.
I am interested in this market myself and would appreciate anyone with knowledge of other products to post up please.