Thank you everyone for your valuable inputs. I have also come across a sparingly used Teac HA-501 Headphone Amplifier for approx $475 which is almost double the price of the Matrix M-Stage available on Massdrop. Would the difference in SQ justify the price? Please let me know
The HA-501 is the amp I'm looking into and my friend in Japan says its a really good SS amp due to the adjustable damping, like the Ember's adjustable resistance/impedance. Since new ones go for $850, I think the $475 is a really good price.