I have the Mystique V3. It's so good I have not upgraded. I do find you should take some time to find the right footers. You also have to be aware of the source. Anyone can take any piece of equipment, set it up wrong, give it a bad signal and find themselves disappointed in the performance. Of course, what are you disappointed in?
I just completed a review of in wall wire. I posted it on my website. What I find is some wires such as 8 AWG NM-B are very analytical. I find that distracting. I find it sort of fractures the performance and forces me to constantly be looking at the parts and pieces. I prefer my source to act more like my 15 ips tape. I want it to give me all the information, and do it in a way that my mind relaxes and enjoys it all at once. Good electronics do this. They don't hide anything. They don't call anything out. They provide a clean complete flow that is easy to digest and follow. Mojo Audio DAC do as such. They are an excellent DAC for the money.