Go with 25lb test. I use 25lb p-line cxx copolymer on my curado 300DSV reel and it works fine for all baits. I wouldn't go too heavy in mono fishing line for 6-9 inch baits. It just depends on you, but I wouldn't go above 25lb test in mono or copolymer. If you want to throw braid, then DO NOT go lower than 65lb test (minimum) as your line will tend to dig into itself. I know guys who throw 100lb braid on their swimbait reels for this reason. Good luck with your reel.