To go back a little to the original post: although I like the idea of better power supplying and have experimented enough (and spent enough), I haven't found that an extra power supply makes always sense.
And I don't agree on the view of some that a better power supply could be put inside the box first - in some cases there is simply not space enough.
Anyway, when I had CD5/Nait5/Flatcap2x I did careful listening sessions in all possible combinations and in the end I chose the FC2x on the Nait's preamp only, leaving the CD as it is; and when my Snaps was ready to power the SN's preamp, I listened a lot: to the bare SN, to SN/HiCap, to SN/Snaps, and in the end the Snaps remained in spite of the fact that even if the bare SN had a good balance, a satisfactory grip on the speakers, wide image and detail (all traits that the HiCap bettered to some extent), powering its preamp with the SNAPS resulted in sweeter, more natural, more articulate timbres of the musical instruments and this was good for me even though other parameters were not better than with the HiCap.
So, if this penchant for power supplies is unavoidable (as is my case), the best things is to have much patience, try, and decide calmly without any preconceived opinion.
M.
Oh no Another one? What is a SNAPS?