Thanks everyone - much appreciated input...
So Behringer is the only game in town?
My previous headphone amp was actually a very cheap Behri unit. I think I paid about $50 for 4 channels (maybe the forerunner to the unit Shack mentioned). It lasted about 9 years of fairly sporadic use, but decided to have a meltdown the other night.
It was actually still running, but sending ear-splitting shards of distortion into our brains whenever the drummer hit his snare drum,or the bassist played a loud note. I'm certainly not complaining about getting 9 years for $50, and I was quite happy with the sound, quality-wise (until it bit the dust, that is).
...It sounds like the HA4700 is a more solid proposition, and would be somewhat of a step up, though.