In order to solve your problems, firstly, you MUST read this if you still have not :
Updated Keyword Tool: Out of Beta - Inside AdWords
Ok, there are also lots of people discussing on its "accuracy". I am not a so-called SEO expert, but through some of my testing and research, I really found that the new updated Google keyword tool beats most of the keyword tools out there.
I really hope that keyword tools like Market Samurai and Micro Niche Finder can adapt to this update as soon as possible so we can do our keyword research more effectively as usual.
Hope this helps you guys.
PS / : Don't forget to use Google Insights along with your keyword research effort, if you don't use it you're seriously shooting yourself in the foot.