50lb Braided line? Too Excessive?

i was thinking of ordering a 50lb spool of braided line, is this excessive. i usually fish for b and catfish, and recently i have seen a few catfish jump out of the water at the local pond who's heads were at least a foot and a half across. and with 20 LB line i would hate to hook it and have it get off. Also i was wondering which brand of braided line is the best to use at 50lb. Its between "PowerPro Braided Spectra Fiber Micro Filament Line", "SpiderWire Stealth Braided Fishing Line", or "Berkley FireLine Braid Fishing Line"