Mcmillan, you have a nice system there. Some of the biggest bang-for-the-buck and least expensive tweaks include:
I. Room acoustic adjustments including speaker placement.
(some say room acoustics can account for up to 80%
of the quality of sound you hear.)
II. Electrical Tweaks
1. Line conditioning. (more expensive)
2. Installing dedicated circuitslines for each
component.
3. audio-grade outlets.
III. Isolating components from vibrations.
-IMO
