[sonicam]

Thanks for your help folks, but I'm still somewhat confused..

Just to reiterate: I need 24 I/O s running 24bit at 96Khz. (I prefer to mix through the desk Shawn).
O.K, so it seems that each interface can only handle a maximum of 16 I/O's - that's fairly clear.

The 192 I/O is specified as having 16 channels of ADAT, yet only seems to have one lightpipe connector on the back - is this right? I thought you could only get 8 channels down a pipe..
The 192 Digital I/O is advertised as 16 chans of ADAT - it has 2 lightpipe connectors- fair enough.
The 96 I/O is listed as 8 ADAT and seems to have no ADAT connection... I don't get it!

Anyway, given that the AI3 will only go to 48Khz, that rules it out. Are there other interfaces that will do 8 ADAT at 96K, (with 8 analog I/O)?
Somebody mentioned R.M.E...
If there is, I can presumably go for 1 x 192 I/O connected to a 96 I/O, with an ADAT converter on either unit, and a HD1 core.
Otherwise, can I go for 3x 96 I/O's chained together? Can the HD1 handle this?

Does someone have some definative answers? Thanks again!