I've had my Musical Paradise mp DAC mk3 for a while. It has user changeable caps (no soldering) and uses both 5 and 6.3 volt rectifiers, and 12 or 6 volt signal tubes. You can even change the chipsets from AKM's to ESS Pros. I've done a couple r2r's but keep going back to my MP. It will do up to DSD 512 and will handle high sampling rates. I like the fact that I can change to sound by swapping tubes and caps.
