Oh, I somehow missed that the mic inputs were separate from the instrument ins. hmm.
You are right, it is gaming, and it isn't all of the time.
The 0404 has a pair of main outs, so I can have speakers connected at the same time as headphone gear, so an spdif dac would more or less be a painless drop in upgrade. I guess taps/splitters would mostly solve that problem, though.
At present, the only I/O unused on my 0404 is the spdif out