I have the old Kappa 8 in a back up system. I've had them since they were new. I agree with Wccoe. The Odyssey works very well. I have Odyssey mono's in my main system. The PS audio HCA works very well too. The original speakers I think were designed around high power tubes like Audio Research. I have tried an number of amps and feel the way the guy with the McIntosh thinks. A substantial amount of clean power and they are great. The Macs may be good too. Old Adcom 555 will play but you'll get bad high end harshness.
