I like the fluorocarbon Berkley ice line. It's a tiny bit stiffer than mono, but I get more bites due to the invisibility. You're looking for a panfish line and I know you said not looking for pound test, but anything over 2 pound and I've noticed decreased lure action on my tiny panfish jigs. (1/64 Oz and smaller) The Berkley blue ice mono in the 1 and 2 pound sizes also works well for icing gills and crappie.