Gopher, I've been an Atma-Sphere S30 owner for many years and just recently had them upgraded to 3.1 status.
Regarding how hot they run, it's my understanding that they run slightly hotter, around 5-10%, than class A solid state amps of equivalent wattage. With the S30's 30 watts/ch it is a nonissue.
I am currently using the S30 with coincident total victory's with great results. I've never heard the superfly's but on paper it's a match made in heaven. With the superfly's 16 ohm impedance the S30 would be coasting putting out appox. 40 watts/ch.
Enjoy the st70 for now and when funds/availability allows you can upgrade.
Regarding how hot they run, it's my understanding that they run slightly hotter, around 5-10%, than class A solid state amps of equivalent wattage. With the S30's 30 watts/ch it is a nonissue.
I am currently using the S30 with coincident total victory's with great results. I've never heard the superfly's but on paper it's a match made in heaven. With the superfly's 16 ohm impedance the S30 would be coasting putting out appox. 40 watts/ch.
Enjoy the st70 for now and when funds/availability allows you can upgrade.