I am using Atma-Sphere MA1 Silver Editions. I also had the M60 and found it had all the punch I needed. I have heard that Mr. Blume used M60's for voicing of the original Coincident high efficiency speakers.
Make sure you try them at least once, you may never go with anything else. I am sure I will never change, and I enjoyed Coincidents own 300b amp.
Make sure you try them at least once, you may never go with anything else. I am sure I will never change, and I enjoyed Coincidents own 300b amp.