Q-line (not pro) is the bomb. I've seen Q-Line line sets that are many years old or more instead of just one season... when you break a line you just cut them 6 inches shorter and re-tie the knots. Plus they make a cool howling sound which is great for keeping spectators away from them.

I will never go back to those cheap china lines that turn into a ball of ramen noodles when the wind blows them, and cut deep when you get tangled in them.