Re: lines and choices/Sylk
If you can, I suggest casting the line on your rod. Some lines are heavier than others and will affect the action of your rod. Also, I've found that specialty lines cast differently. For the buck, I like the Cabelas line. However, to me the most important thing about a line is that is has low memory. I'm using a Sylk line on my four-weight and I love it. Maybe I can cast farther with other lines, but to me, line tangles are one of the worst things about fishing.
In the end, whatever line you buy is a compromise, like so much else in life.