Speaker Cables - Long Run

Greetings -

I'm stuck with having to run 20' of bi-wire cable from my Conrad Johnson Premier 12's to Vandersteen Quattro's. Have been using Van Den Hul Tea Track, some say I can do better. 

Without breaking the bank, I'm considering upgrading. 

If anyone would care to recommend a bi-wire cable that would do well in a 20' run, I would appreciate it!

Thank you!