Sanders magtech or odyssey kismet

I've owned Sanders ESLs (twice) and that amp is the primo supremo. Never heard the kismet so can't comment there.

ps if you dig your speakers, that's all that matters

pps you should delete your duplicate post.

So I have an early version Kismet in Stratos and just got the Sanders Magtech to demo on my Magnepan 3.7's.  The Sanders is much better, especially at higher volumes.  It's less grainy overall.  The Kismet may reveal more detail though.  If you're running efficient speakers, it may not make as big of a difference.

You’re at no risk to try the Odyssey amps, as they have a, "no questions asked, 30 day return policy", same as Sanders. (http://www.odysseyaudio.com/sales-usa.html)

the Sanders Magtech & ESL amps are meant to drive ESL speakers. That doesnt mean that they cannot drive other speakers...
.....but you have to understand the difference, electrically, between an ESL & a cone-driver speaker.
An ESL can be thought of as a huge capacitor. The impedance profile of a capacitor is XC= 1/2*pi*f*C. I.E. when the freq is low (bass), the impedance of an ESL is very high. When the freq is high (treble) the impedance of an ESL is very low. Exactly opposite of a cone-driver speaker. Another difference is that an ESL is a voltage driven speaker - remember it's a capacitor & a capacitor is a voltage-driven device. 
A cone-driver speaker, 99% of the time, is a current-driven device since it often has a much lower impedance. 
Therefore, if you read the Magtech & ESL specs, you will find that their rails voltages are very high. This is done to develop sufficient voltage at the speaker terminals. You might not need such high rail voltages for your Energy RC-70 speakers but i think you will need a lot more current. 
Keep this info in mind as you make your selection....

Bombaywalla---Does the voltage-centric nature of the Sanders design make it a less-than-optimum match for the current-hungry Magneplanar speakers?