As far as mono goes, Stren or Berkley Trilene have both performed as well as any. One thing to watch out for with mono is that if you don't police line tension throughout all phases of building the leader, including inital removal from the board for the final "spinout" it can develop little pigtails. These are sometimes easy to pull out sometimes not so easy. They have never affected casting or fishing but they are a tiny bit ugly in the overall symmetrical view.

What the other guys were saying about thread is true, thread is much limper, no memory and within reason can be just as tough as mono.

I personally like Uni 3/0 but you may find another thats better for you. This is a land of personal experimentation. Whats best for me may be useless for you.
Good luck!

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RRhyne56
[url=http://www.robinscustomleadersandflies.com:ac02e]http://www.robinscustomleadersandflies.com[/url:ac02e]
IM = robinrhyne@hotmail.com