I use Google. That's where market samurai gets its keywords from. In fact, thats where the majority of the Keyword tools get their keywords from) I also use Wordtracker and seobook. Seobook has a lot of other good stuff on there besides the keyword tool.
I prefer to use Google Keyword tool and other popular keyword tools are 1. Keyword Winner 2. Market Samurai 3. Wordtracker 4. Keyword Elite 5. Micro Niche Finder
I will agree with you, that you can stick with any of them for all your needs. Though would go with 'Keywrod Elite' if have to stick with only one tool.
Whether you like it or not, but surely google adwords is the best keyword suggestion tool. I would emphasize to use this.
so i think i like MS, one thing i am running into is finding best way to find local/regional keywords. Also, My niche is extremely competitive. Martial arts equipment. Yes, I am one of those who put the cart before the horse. I was wondering if it makes sense to tweek the 4 golden rules to find words. Any positive thoughts are appreciated
Market samurai it's very easy to use you can use the trial version and see if it suits you right even with the free trial your good to go.