Best Keyword Research Tools

[PaulMycroft]

Hi all,

My renewal for Keyword Discovery is up in January and I was wondering which keyword research tools are considered to be the best ones.

As Keyword Discovery costs $600/year, is there a better paid keyword tool to use. Would I be better off becoming a Pro Member of SEOmoz and taking advantage of their tools instead?

Any advice is appreciated.

[sammikr06]

I use Word tracker. It is best tool for keyword research.
Thanaks