I currently use a Berkley Big Game Mono Leader, 60 lb test. I have no complaints. The stuff is very abrasion resistant and has never given me trouble. Maybe a little stiff, but I'm used to it now. I keep reading about Fluorocarbon and its "invisible" properties. Was thinking of possibly switching over to a Fluoro leader. Looks like Seaguar is a popular brand. Fluoro is more expensive though. Just wondering if anybody has tried both and can chime in. Looking to compare the abrasion resitance, diameters, knot strength, and flexibility between the two. And ultimately if it's worth the extra cost. Appreciate the help guys!