I like the Marlow Racing 4 mil. Strip the cover when it has to go thru a snuffer or where it will contact the spin, it will wear a spin or a carbon snuffer, the cover is abrasive, but the core is nice a smooth.
It is easy to stip and bury the cover. If you dont know how, check out this link
http://www.samsonrope.com/home/pdf/ClassII_Core_Dep_Strip_Inst.pdfI've got this stuff on my spin halyard and the retreival line, and the halyard (same line, on a loop) and the tack line, works great, hold well in cleats.
