Very interested in the M12 Gold switch.
While the ER, SoTM and Melco have their own strong sound signatures, the M12 Gold is designed by Telegartner which meets high spec standard and seems to have the most balanced sound from different review on the web.
Looks like its a no-brainer solution...
Thanks very much for the detail explanation.
I wonder those audiophile highly recommended Elpidia chips DDR3 memory back in the days also have such good characteristics of low cycle length and long refresh interval.