Batch - As usual, I fully agree with Mapman. I have a pair of 2000s, in a basement that is about 20' X 18' X 6' (yes, a low ceiling), so it is in the upper range of the cubic footage for the 2000. I power them with an Odyssey Stratos HT3 w/cap upgrade (150 watts/channel). I do cross them over, first order, to a pair of Vandersteen 2Wq subs, so the power demands are reduced somewhat. Although I believe I have enough juice, one day I would like to try some really high powered amps with them, based on what Mapman and others have said.
Arion Audio makes some very sweet sounding Class D and tube hybrid class D monoblock amps with either 250 or 500 watts each. I'd love to hear my Ohms on those, but due to financial considerations, I'll have to wait. They are not crazy expensive, and based on hearing them on several occassions, I think they are a terrific value.
All that said, I did briefly hook up the 2000s, full range, to a vintage 1993 Onkyo surround receiver. I was knocked over by how good they sounded driven by the Onkyo, which is rated at about 80 watts/channel. The bass was full and deep. The bass was so good that if I didn't love my Vandy subs, I might consider running the Ohms full range and selling the subs. But I do love my Vandy subs!
I am hardly unhappy with the sound I have now, even if every now and then I wonder if more power would improve on the already stellar Ohms. I may upgrade the amps someday, but the Ohms stay!