I am VERY happy with my system. It sounds great and just the way I like it. My only issue is that some of the material/recordings are not up to par. Even with the C220 in the system, many recordings are thin and 2-dimensional, especially (and not surprising) streaming audio at less than full CD quality.
In my experiments, I've found that the combination of tube buffers and the right kind of EQ can work magic with some material. I believe that the best combination for adding some tube warm and delicious sounding EQ is a product that Jeff of Tone Audio has reviewed and given its top award to.
Feast your eyes on this beauty:
For the review and more fantastic looking pictures of this device get the PDF of the issue of Tone Audio
here and go to page 88.
In summary, while I am ecstatic with the sounds (and tone) of my system these days, I am less ecstatic about the quality of some recordings and I believe that a great next investment in my system would be something like the Massive Passive. If I end-up buying it, it will be my next video review on YouTube. Only problem, there's no place around here where I can audition it. Since it's intended for Pro (i.e. recording studios) I guess it's only available through mail order.
Anyway, thanks Jeff! Being very happy with my system is great, but I do miss having something on my "want list".
Alberto