For pannies and most trout, I'm a fluorocarbon guy. I like to use 3 or 4 lb. Berkley Fluoro Ice. Invisible to the fish below, strong enough to handle larger fish, and few issues with memory. I spool up the entire reel with it. No leaders or backing. For the toothy fish ('eyes, pike, lakers), I use Berkley Fireline Ice in 8 lb. and tie on a 6 lb. fluoro leader.