Here are two flouro tests from tackle tour that might help? It's decent reading...

First Test
http://www.tackletour.com/reviewfluorocarbontest.html

Sequel
http://www.tackletour.com/reviewfluorocarbon2.html

There is a lot you can take out of this.

Here is what I got from it. I was using P-Line but I'm going to also try BPS as well and compare the two this year. I've never had problems with Pline but BPS gets a lot of high ratings in these tests and from people on this board.

Hope this helps...