Fireline.
Probably most under-rated line out there. 30# test breaks at around 60#.
Hi-Vis green seems to break closer to it's rating IMHO. Pink, if you can find it, is good too.
Tuff Line XP hi-vis yellow is good. Identical IMHO to Power Pro except a bit less expensive and never heard of any QC prolems which have plagued PP from time to time. I've had two visibly bad spools of powerpro, one with visible weak spots throughout the spool and other with globs of extra material fused to it. Did have others that were fine, but have switched all my reels to either Fireline or Tufline XP and no more issues at all.
Personally, I tend to match the strength of my braid to the mono I would have used. That way you get the true benefits of braid/superlines, not just matching approximate diameters. If you used to use 20# mono, no sense in going over 20# braid. You'll get the strength with a much thinner line, which is one of the major points of braid/superlines.
Too many people are using heavy braid to make up for it's thinness and overloading their gear, ie 40# class gear and putting 50#+ braid on it. Sure it's easier to see and manage, but really losing alot of it's benefits to begin with.
Just spooled up my go to fluke spiining reels with 10# Fireline.