john doe wrote:they have two cards?
I was kind of kidding but then again, not. The d8b performs markedly better with the Apogee clock card than the stock clock card. Also, if you are considering an external interface, you will want to be clocking everything from the one clock and the Apogee is the only way to achieve that since it has BNC in and out.
The advice regarding the RME interface is sage. MOTU are a lottery IMHO. I've had good ones and I've had bad ones. The Mk 3 2408 is ok but don't get anything prior to that. They're problematic and tech support is notoriously thin on the ground.
Peter
In the scheme of things, there isn't one... just chaos.