I fish airflo ridge lines in many line weights. they're the best lines I've ever used. they have a "5 year no-crack guarantee". I haven't owned one for 5 years yet, but my 5wt line is still in perfect condition after a year of heavy use and abuse. I have the 8wt bonefish line that Troutman's talking about. It has a taper which seems more suitable for long casts, which is not so great for what I use it for, but may be perfect for you....