JazzontheH: Where did you get your power supply upgrade for the touch? May be the cheapest solution to upgrade fever :-)I use a Touch digital out to my DAC for internet radio. I replaced the SPS with a Channel Island VDC-5 MKII linear power supply.
http://ciaudio.com/products/VDC5MKII
The sound improved but never realized the SPS was polluting my system with noise. Even when the Touch was off, NOT playing, SQ improved. As you know, Touch is never totally off even when not in used/playing.
My advice, dump/replace all the SPSs in your system.