What you need the Go for?, no real need for muscle here I'd say. I use the mini for all my "shit", but then again I love the sport of it if all..
I know I got a tendancy to push things down other people's throats, but how'd like the IR remote idea? It's probably a good lot simpler than you might think.
And also, again, got amps? What are they and what you feedin em with?
I don't need Go! but I just got one with touch display and more modules, so why not build a nice control interface...
I was thinking of building a audiomixer with an TDA7313 (or 7719) on each channel, but since the I2C address is the same on all TDA chips' I need a multiplexer or one Netduino on each channel. It would be nice to have a "mini-mini" Netduino (just like a Mega328 chip on Arduino).
IR remote is a good idea. Amps haven't got to more than a headphone amp... but the amps that you used looks interesting.