I second Sdatch's recommendation of the Partial Eclipse. I prefer the Coincident's Eclipse line to the Victory line but it is a matter of taste. If you are patient, you may be able to get a Super Eclipse within your price range. This is a great speaker with the M-60.
What speakers match well with Atma Sphere?
I'm considering the switch to Atma Sphere M60's tube mono blocks. As much as I love my Pass Lab X600's, as a renter who has had to move three times in two years, they are a pain to move. However, my current speakers are Dynaudio Contour 3.3 (4 ohms) which require a lot of power. My understanding of the Atma Sphere M60's are they perform well with 8 to 16 ohms speakers. So what would be an excellent speaker in the $3000 -$4000 (used) range?