I don't like flouro as a main line at all, I find it's not very manageable, especially on a spinning reel. Seems to jump off the spool easily. I don't really see the benefit in a main line flouro, other than the sinking factor which I don't really need. I mostly use braid, and attach a flouro leader where finesse and water clarity dictate. I agree with Skipper, flouro know strength isnt' great....you really need to wet and SLOWLY cinch down your knots. It is also much more abrasion resistant than braid. As for brands, I too like the seaguar invisx. Pline-Flouroclear is good too, but I think it's technically not 100% flouro, it's a co-polymer. Don't buy Berkley Vanish, it sucks and breaks easily.