Trilene XL is a workhorse - works well with just about any knot, though a bit stretchy. Gamma ESP is a thoroughbred. Less stretch, great strength for the line diameter (2.5# for 2# class, up to 5# for 4# class), and almost as invisible as fluoro. Just started using it last year. It doesn't seem to have any memory problems, either. Watch out for the knots. Best knot by far is the palomar for either joining directly to the jig, or making a loop knot. Improved clinch knot works well, too. Std clinch and braid knots WILL slip. A 2-wrap Surgeons knot gives full line strength when joining ESP to your mono filler line.