Mprime, are you still using the midnight speaker cables? Not a bad cable, I used the midnight 2 bi wired for many years. A while back I stepped up to the Audioquest Sterling.Definitely a big improvement.
I use AQ Diamond2 silver ics.
I am not one who considers ics and speaker cables as tweaks.
They are just another part of matching, and connecting the equipt together. But a very important link.
Bottom line, at this point in your system it may be time to upgrade your cables. If you look for new, see if your audio dealer will let you check out demos. Make sure they are already burned in.Just as you match equipt with each other, so should you match the cables with the equipt.
If you like the midnight cables, you might want to watch Audiogon for a used pair of AQ "clear" or "sterling" speaker cables.
Good luck, Jim