I have used GB Trilene for the past 15-20 years and never found it lacking. Some monos are better, but at $8 for a 1/4 lb spool, I just respool frequently. Always have 10, 12, and 15lb in the shop, usually in clear, although I won't go to another store to find clear, I just buy some green. I can honestly say that I have NEVER broken a fish off spinnerbait fishing with 15lb, and IMO, I see no need to go to 20lb. For flipping, pitching, and worms I use braid, not mono.
Great line, great price...what more could you ask for?