I'm starting the like the idea of a seperate amp for another reason. I just got very nice av reciever - too much $ - with very nice internal amplifier(s). But what happens to that unit when its HDMI inputs/outputs are the equivilent of the VHS tape. ~that will probably be sooner than I care to think about right now.
An alternative would be to get a nice external amp - maybe a two channel for left and right speakers (or a pair of mono blocks for the same purpose). A good amp will last a long, long time.
So as recievers are replaced due to features, I'll be able to rely on the extrnal amp to power some or all of your speakers.