It's raining, the rivers are blown out, I'm tired of tying, so here goes...
The 16-20 knot is my current favorite, followed by Kreh's no-slip loop, and then the Trilene knot.
Those unfamiliar with the 16-20 should give it a try. I came across it while checking out an Alantic Salmon website and have been impressed with it's strength, durability, and compact structure. I've yet to have a single 16-20 knot fail.
Here's a link if you care to give it a try: