Yeah.. somehow I had it worked out in my head that the independant headphone mixes and the TB mic were all heading down the same pipe. This way makes way more sense.
Hmm.... having all of the OS sounds and other stuff going through a soundcard that is not my fireface? I do like the sounds of this! It's good to know that I can keep on making tweaks and improvements to my system, to facilitate the overall experience of recording.
I'll think about it, Sub probably has a pile of those kinds of sound cards kicking around.