Can I suggest that you bring your question over to the Users forum? You will find a whole bunch of people that may have missed this and who may be more qualified to answer!
Also my interface has optical ins that if I need more audio inputs would allow me to attach a Focusrite Octopre which would give me 8 more preamp inputs. I don't know about other makes so much but I think this is fairly standard?
Last edited by ETalk; 2013-05-28 at 07:39.