i'm not sure what the drum protector is either. maybe it is a typo and should be "line" protector instead.
if you can afford it, i would go with the 3/8" viking combo line. the safety thimbles are really a great thing.
check out this link to see the difference between the safety thimble and the crush-proof thimble. with the safety thimble, you don't need a hook. with the crush-proof thimble, you have to by a separate hook (well, you don't HAVE to, but i would recommend it).
Winchline.com Hooks/Thimbles
also, you can use a metal roller fairlead with a synthetic rope. i do, and know lots of people that do it. you just have to make sure it isn't all scraped up and/or gouged from using a wire rope on it in the past. scratches or gauges will potentially damage a synthetic rope.