That looks like a wonderful system. You've been content for more than 15 years? I envy you in that regard.
I had a pair of Vandy 1Cs a few years ago and loved them. They were magic with the proper tilt angle which was almost no tilt in my room. Unfortunately I traded up to the 2Ce sigs and could not get them to work in my small room.
I have also been using Audioquest Slate speaker cables in a biwire configuration for many years. This cable is another true bargain IMO. I also like the AQ Type 8 cable which is very similar to Slate and reasonably priced.