First pof all - very nicely done! Im a tube-head myself, and know (and like) your preamp very much!
If I may so bold as to make a suggestion: you need to at least audition some better power cords . I know signal is a nice value, but i think your system (esp the CDP and preamp) are begging for something better.
Audience is very good all around and very affordable (relatively speaking). Purist, elrod shunyata and (my reference) electraglide are even better, though more $$.
Find a local dealer who'll let you try it...