[Nickthedentist]

There's no "right" answer, I suppose.

Personally, I would still be inclined to use one speaker per channel of the amp; you'd not have half the amp idling and doing nothing, you'd potentially get a greater total power output because you'd be using all of the amp rather than half of it, and you'd have the option of listening to an external source (CD player, iPod or whatever) in reasonable stereo.

N.