Just got a couple 50's. First time with tackle like this. Want to respool. What lb test should I go with. PENN gives capacities using 50#. My friend said he is using 80. Opinions? 
x3 on the 60lb Diamond.60 Momoi Diamond! They rate the breaking strength around 91lbs.
But how many more Yds of JB is needed to fill the spool due to the diameter differences? I haven't researched but I believe it will be considerably more dinero. Like 50% more... :huh:Momoi diamond 80 is around $230 for 3000 yards.. I can get 2500 yards of JB 130 lb for $299, the price is not that much more and will pay for itself after the first season.. After that you are ahead of the game.
60 lb Mono is a great option. But when you get down to this, JB is pricelessx3 on the 60lb Diamond.
For 99% of what you'll do with a 50W, I personally think the Hollow Core braid top shot approach is a waste of money (and a lot of it). I like braid/mono on small reels, but I just don't see the benefit on the big stuff. Just my .02.
May do some trolling. Sharking for sure. I am debating with a friend the cost of the JB hollow core vs just mono. I know he will be trolling with his.