Spiderwire is a lot like Dacron, and I think more resistant to UV and less abrasive. It is also more expensive lb for lb.

I'd go with either one. I just happen to have a lot of the Dacron already on hand.

In fact, I think there are now about half a dozen different synthetics out there that spec out about the same. I guess it just depends on what you are familiar with and what is available.

I grew up using dacron line both for my top end kite flying out at the Oregon coast, and for fishing up at Hakai and the inside passage. Back then, that was pretty much all there was for sportsfishermen. I guess that's why I always go back to it; I know what it will do and am familiar with it. I suspect I would find the others do just as well.