Market Samurai is very easy to use in my opinion. Have you watched all the training videos?

Also you should write down notes while watching it!

Check out Keyword Winner by Daniel Lew...

You can use my software to build huge lists of keywords.

Then use something like Long Tail Pro to research your competition if you don't like Market Samurai.

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The benefit of the Google Adword tool for SEO is that it enables you to research your potential keywords for your site providing you with enough information to allow you to make an informed choice on what keywords would suit your business best.
This tool has helped us to advise our customers on phrases that are both relevant and specific to their industry or products. Google's tool can help you discover phrases which maybe uncompetitive with large search volumes, this is ideal for a new web site with no weight within a search engine. The best way to assess what are the right keywords to use is by using the Google Adword Keyword Tool.

Google adwords is best and market samurai also get data or feteching results rom google adwords keywords tools.. Even 70% people use google adwords keywords tool to find the best and possible keywords...

Google Keyword tool

I've always preferred Traffic Travis v3 over TT v4. The version 3 of TT was a lot more stable and easier to use (for me).

That said, I now use SECockpit. In my opinion, there's nothing that comes close to its power and usability.