Hey Keith,
Just re-did mine for 9:1. got 42' of 10mm Marlow D2 and did a 10' taper on it. does not include the traveler line. I like D2 because the cover is nice and stiff and does not hockle much. APS has a tail of this (around 42') in the clearance section for around $40. I tried conception for jib sheets but don't like how it is holding up. UV kills it pretty fast. I also liked endurabraid from NE and would use that as well. If going the with the plan of splicing a core to a single braid, I would use swiftcord or salsa. I don't trust how anything with polypropoline would hold up long term.
Just my opinion, but opinions are just like....