I recently picked up a pair of Kappa 6.1 series iis at a local thrift and while I'm waiting for the fresh surrounds I've been wondering about how to power them. Currently I have a Yamaha M-50 power amp (120 watts into 8 ohms), a Luxman L-430 (105 watts into 8 ohms) and a Yamaha CR-2040 (120 watts into 8 ohms.) The Infinity website lists these as 6 ohms and 89 dB sensitivity. Would any or all of these drive these speakers adequately? (I suspect they would like even more power, but I am unlikely to be springing for that any time soon.) I've heard the Kappa speakers are pretty demanding, but worth it. These are my first Infinity speakers that weren't from the lower end of the line and I am quite excited to hear them.