The Eminent Technology LFT-8b is very well suited for the M60 in all regards save one, that of sensitivity/efficiency. The LFT is rather insensitive/inefficient (rated at 83-4 dB), so in a large room at high listening levels the M60 may not provide enough power to the speaker. But planars are known to sound louder than equivalently-rated dynamics.
In all other regards the LFT-8b is an excellent match for the M60. It presents an almost purely resistive 8 ohm load to the amp, the midrange/tweeter panel itself an 11 ohm load. Put a solid state amp on the dynamic woofer (180Hz down), the M60 on the m/t panel, and live happily ever after! Ralph Karsten says he has M60 owners successfully using the amp with the LFT-8b.