Best Tool to Build List of Competitor's Top Keywords?

[sftravel]

What is the best (hopefully seomoz) tool to create a list of the keywords bringing the most traffic into a competitor's website?  Goal is to build a list of keywords that bring the competitor the most traffic, stack ranked by volume of traffic coming into the competitor.

[Marcus_Miller]

Hey,

I am not sure there is a single tool that is going to do that for you without some legwork on your part.

You could review the terms for a given page using the term extractor 
http://www.seomoz.org/term-extractor

Then, you could get approximate keyword volumes for these through the google keyword tool & your clients rank via google searches or the moz rank checker tool.

The best  way to do this would likely be to set up a campaign, mark this person as a competitor, track the obvious keywords and then manually extract others with the term extractor and track it that way.

Not a perfect answer, but  there is going to be a bit of legwork involved however you approach this.

Marcus

[sftravel]

Ok, this is not a plug, but I figured out after researching further that semrush.com offers exactly this tool - for $80 / month.  Would love to see something similar added to seomoz awesome toolset.