I recently upgraded from the MZ2 to MZ3 and there were many considerable improvements. I did not go with the MicroZOTL because my system is digital and did not require all the inputs on the MicroZOTL. I'm using the MZ3/Ultralinear combination and it is heavenly.
LTA micro zotl preamp
For all you working class audiophiles! Listen to me carefully. The LTA micro zotl pre amp is a giant killer! Just got it and with stock tubes it has great promise . Great dynamics, presence and resolution! You don’t need to spend $30k to get a decent preamp! I’m not kidding! Enjoy the music!😊