Thanks guys for the replies!
Mark, I find the Varivas a bit stiff and waxy. For the first several sessions, I suffered a lot of wind knots, but this has eased over the last couple of years to almost nil. I will say it's incredibly strong. I've not broken it on a fish ever. Yes, it can be hard to see, but I don't find that a real problem.
I've got YGK castman on my other GT outfit and like it alot, but might give the hollow stuff a go.
Cheers.