Hi Kurt
Issues on line always get brought up in all sorts of fishing but it is what's between you and the fish!
I am sure a lot of experience guys here will advise you on these.
For me I always ask: do I need big cast? If rough terrain and short cast only, what is the lightest ican get away with? How heavy can I fish with the rod? How much drag can I apply? What size poppers or stick baits I need? All these questions links to your choice of line.
My recent trip to new cal got me thinking a lot on having the right set up. When you fish New Caledonia you need to do big cast most time, but when you in the lagoon you need heavy line to skull drag the GT or should I say lock up the drag and hang on
Pe8 is my choice of line, you should get a little more on your 6000. But why don't you put varivas pe6 on
the 6000spool and buy your self 6500spool and put the pe8 on it ( you will get 300m on it).
For me a rule of thumb, I always have 300m on my spool, because you never know when will a monster dogtooth jump out and eat your popper or stickbait.
Hope that day come earlier than later