there is a lot of information missing in this question... what brand of rod are you casting, is it fast, medium, slow... you mentioned a preference towards wets.. your rod may be a stunning dry fly rod but a poor rod for lake fishing streamers or heavier flies... you might decide to go to a sink tip.. I would, but thats me, take the rod in question to a fly shop and ask them what lines will cast best for your aplication, rod, and casting level... I think cortland is fine.. teeny or scientific angler mastery might have better choices for your rod-