The 1200 will fit the empeg, but not much else.. i picked up a 1400, and managed to fit the empeg, power supply, rca cables, several rca adapters, tiny set of speakers and headphones and a small netowork cable. The only thing i couldnt fit in was the usb and serial cable.
Don't be afraid of the plucky foam stuff its easier than what other posts have said to work with, just requires a little forethought.