Prices are conspicuously missing from the TacT Audio website, so I asked them in an email:
RCS 2.0 DD         $ 2,950.-    (basic version, Digital in/out only)
DA module $ 599.- (Analog output, 24/96 converter module)
AD module $ 699.- (Analog input, 24/96 converter module)

RCS 2.2 $ 4,900.- One configuration only, Digital+analog in, analog out only.

Millennium Mk. II $10,300.-

TCS $ 9,990.-
It would be a while before I can drop that kind of money on a home audio system.

Borislav