Been doing this for three years now with no real urgency to even contemplate spending a pile of cash on making the system any better. MacBook's, big drive, Remote app for iTouch & iPhone, Airport - optical to a G68, G57's and B&W802D's. That'll do nicely, thank you.
The next 'sensible' purchase will be an iPad, by which time I'm sure an even cooler Remote app will be in the wings - the justification for complex, 'feature rich' systems which you really have to 'learn' how to use, and more so, which my wife would never use, has no appeal - other things in life to be getting on with. Just my view.