In the never ending quest for better sound I replaced the monica 2 dac with the Opus. The monica 2 developed a scratchy distortion that I couldnt fix. The Opus is a modular kit that uses the wolfson wm 8740 dac chip. A lot of people seem to like the wolfson chip. For $265 I got the single dac with the metro clock, spdif and optical input and ps. All the components are installed on the boards except for the components on the ps board and the all connector strips for the boards. That way you can hard wire the boards if you want or not. It all went together in an afternoon and is taped in a box for now. I am using it single ended straight off the dac to my pre amp. It sounds great. Very quite, great detail and imaging. I'm not going to be too critical, its only one day old but it sounds more dynamic than the monica. I'm surprised I didnt have any problems connecting all the wires and setting all the switches. There are a lot! I am gutting an old cdp and will make a wood face for it to use as a case. I am very impressed with the quality of the kit and the way they labeled all the parts. Highly recommended! When I get the case done I will post pics. DIY is the way.