Mark, if for some reason we need to run 2 sets of cables under the floor to each channel (sub towers) someday, I know that the 2nd pair of TA Opus will not fit. I know whom to call! Having compared your much earlier generation of cables to TA, I was shocked and impressed about how well they compared and well their voicing actually went together in terms of the meatiness of the sound which I really like about TA...the upper levels which also have a light to them in the treble which I did not find so much in much earlier generations of the Ultra line (10 years ago).