4 for each braid so i guess thats 12 !

What Kind of fishing line is best for a spinning reel? and how much Lbs?
Braided Superline? Monofilament? Fluorocarbon?
10? 12? 20? 30? 40? 50? 65?

I own a Penn 525GS Mag. I believe it fits 275 yards of 15lb mono. I want to use 20lb braid with an equivelent mono diameter of 6lbs., and need to be able to get long distances for surf fishing. Any help on the mono to braid fishing line conversion would be much appreciated! Thanks.