If I remember these speakers correctly, they are 4 ohm and drop down to somewhere more like 3 ohms....
With that.... Audio Refinement Complete 50 watts to 8 and 90 watts to 4 ohms.
Coda Unison 3.1, 3.2 or 3.3, all will drive this speaker. this is a great sounding unit and extreme value. Probably $1000
Krell 300, should find one of these in the $1000 range.
If, I think of others, I'll reply, These are all that come to mind
Tim