Another vote for Porter port. My jaw hit the floor once I gave this a listen. Everything significantly improved. The best part was that it only cost me $35. I would rank this as the best improvement for the cash I have heard on my rig.
Your Favorite AC Outlets
I am getting ready to re-do my AC runs from my junction box to my listening room; going to add dedicated lines for my monoblocks. I want to upgrade my wall receptacles to good quality isolated grounded outlets. Have you tried the PS Audio outlets? Is their higher priced gold plated outlets that much better than their cheaper model? What brand(s) do you like best?