Google keywords tool is only going to suggest, but no reality in it... Yeah i admit that it provides good keywords but no assurity related to suggested click rate.
I looked it up in the adword tool, looks like its a $3.40 click - with only a few searches per month... are you sure that's the correct wording?
business to business keywords have high rates and your typical webmaster is going after all the basic stuff and has no idea ;-)
finding a best keyword is not at all a matter. we want to write articles for that keyword, there you all get sucked.