Its not quite right what you said since you presumably dont have a platinum xfi. that front I/o drive has lots more inputs and outputs than the vanila
I have coaxial in out, optical in out, midi in out, line in out ,headphones with volume control its all there. much more than you were suggesting
XtremeMusic also has midi and line IO's and headphone control on the Volume control panel... that leaves you only with coaxial and optical outputs. hehe...