I tried a bunch of stuff (borrowed from dealers) and ended up using Canare 4S11. Some cables beat it at shorter lengths, but nothing did at 30ft. I run it single wired instead of bi-wired. I have approx 30 ft runs that I can't do anything about until I buy my own home.
At $1.35/ft from Blue Jeans Cable, its not a huge investment if its not what you're looking for.
At $1.35/ft from Blue Jeans Cable, its not a huge investment if its not what you're looking for.