Up for your consideration is a Pass Labs Aleph 3 pure Class "A" amp. I have owned this amp for four years and used it to drive the top half of my Emerald Physics CS2 speakers (103db efficient I believe), so it has not seen much in the way of hard use.
I have marked it as 7/10 due to the rear heatsink that houses the input/output section is slightly tweaked (as seen in the pictures) and does not sit flush against the amplifier. The amp arrived to me this way and has no impact on the function. I feel I have priced it accordingly (two on ebay right now for $1300). Otherwise it is near perfect. It has been kept extremely dust free, functions flawlessly and sounds brilliant.
Let me know if you have any questions.