Here's a thread that you might find interesting concerning the Berning ZH-270 tube amp. 70 powerful watts per side and uses 100w at idle, 300 at full power. Extremely versatile, reliable and great sounding. Unfortunately they're hard to find, and will cost in the high 2k used. Worth considering though. I'm using mine with Aerial 7B speakers, which are 6 ohm/86db. The Berning drives them with ease.
http://forum.audiogon.com/cgi-bin/fr.pl?aamps&1018837399&read&keyw&zzberning
http://forum.audiogon.com/cgi-bin/fr.pl?aamps&1018837399&read&keyw&zzberning