Denon1 - IMO the Andra II's WANT at least 200 or more watts to make 'em purr and with the Plinus, IMO, you should be good to go as they say. Should sound marvelous. If I had the dual set of posts, I'd definitely save up the cash to get some good bi-wired cables as Stringreen & Kurt_tank suggests. You can also call Jim (Thompson) at Eggleston & chat w/him -- nice guy.
I was pushing them with dual McIntosh MC275's in mono/parallel (150 to 180 wpc) and replaced them with McIntosh 300 watt tube mono's (MC2301's). I usually listen to between 3 & 30 watts -- but a huge difference with the 2301's (of course, the 2301's have improved everything with their great S/N ratio of -117db).
Jsd52756 - too bad for both you & Eggleston -- these speakers are worth every effort to audition.