I have Monitor Audio RX2 and I don't now what amplifier is best for me. I am going to play music from Asus Xonar STX and I would like to enjoy 192/24 files. I like detail sound as well as the controled and precise bass. My speakers goes up to 35KHz but NAD goes up to 20 KHz and that's what worries me. Please some expert help me, urgent...