Opera, the new HairFX from Lightwave is very powerfull and works almost the same way that Carrara hair (for brush and things like that), Sasquatch is an old fashion hair, but its a post effect so you cant render under certain conditions and is very slow. The new hair system was a plugin for Lightwave in the past and use a new way to add hair to object and its very fantastic job that you can see at Newtek forums.
The Polygonal hair is used in a Manga way: you can make some polys flay away to simulate hair move, and work very well for some cases.

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