Out of the FC I've tried, (Seagaur AbrazX, InvizX, Red Label, P-Line, Trilene, Sufix,) I'd pass on the P-Line and go for some AbrazX, InvizX, or Sufix. I find Sufix as a nice medium between manageability and abrasion.
Well I've been "specifically requested" to try P-Line first by one of my good buddies who is a pro. Plus I can get it for a filthy low price. I'll try AbrazX too.
Ps- PM coming your way soon.