Jfrech,
You are one lucky person. Your system and room are enviable.
You are absolutely correct about cryogenic treatment of cables, tubes, and anything made of metal. I've been doing it for a long time. Sound is enhanced dramatically. It becomes better focused, more dynamic, and the soundstage is usually better in all directions. Often leading edge transients become less hard but still detailed and natural sounding. Tubes should last much longer too. Cryo treatment is inexpensive and can be found after market by searching the web. If you haven't treated the wires in the rest of your system I encourage you to do so. First check with the mfg to be sure they haven't already done so.
