Okay... I agree completely that Seaguar (leader material) is the best and that Vanish sucks! I lost three kings in a row with 30lb Vanish leaders. So I started tieing 20lb maxima stading on the river and didn't loose another fish that day.

The beauty of FC though is in it's refractive index and consequent near invisibility. Take a lesson from tuna chunkers and use the lines invisibility to bump up your line test to make up for poor knot strength. As an added bonus you will get better abrasion resistance.

I have experimented with Seaguar, Triple Fish , Vanish and Stren with mixed results.
Right now, I have settled on Stren. A spool only costs $11.99 for 250 yds ( from memory) and I am running 17lb test with 12lb Riverline for main on my bait rods and 12lb Izorline on my plug rods. The 17lb Stren breaks before my mainline almost everytime. It seems to have worked out well so far.

Just my .02
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In the legend of King Arthur, the Fisher King was a renowned angler whose errant ways caused him to be struck dumb in the presence of the sacred chalice. I am no great fisherman, and a steelhead is not the covenant of Christ, but with each of these fish I am rendered speechless.