if you are after a line for the rock marks where abrasion resistance is of paramount importance you can\'t go past ghost line, not overly expensive but top of the abrasion resistance tests by a proverbial mile
http://www.anglersnet.co.uk/authors/dave02.htm
(scroll down to the second of the tables for the abrasion test results.)
the abrasion resistance does in my opinion come at a cost, it is quite \"springy\" but not overly so.