Market Samurai is probably the best for what u want to do.The free version is very good and you can also go with Google Adword Keyword research Tools.
Every seo experts use different keyword research tools. Keywords research is an essential part of the SEO strategy. For Keywords research you can visit Google Adwords, Word tracker.
Search on Google adwords keyword tool for keywords. Select relevant keywords. It is better to select long tail keywords as they rank easily. Competition of keywords should be less and monthly searches should be more.
There are various tools which can tell you the appropriate keywords and key phrases to choose for your website, like Google Adwords, Keyword spy, Mejestic Keyword Checker. You can go for Google's adword keyword tool, this one is the best. You need to analyse your competitor's targeted keyword as well.
RankZen.com is an advanced keyword tool that can help you choose the appropriate keywords for your site. It not only provides SEO information on where you're ranking, but it will also show how your competition is ranking for the same keywords. You'll also be able to find out what keywords your potential customers are looking for. Basic sign up is free, but other monthly plans are available as well.
Use google's keyword research tool which will give you an idea of which keyword you have to select for PPC, the popularity of the keyword and what is the price of per click for the keyword you have given.
Use google keyword tool , Find the targeted keywords that have low competition and include the same in your url, title tag, meta tag , h1, Links title and also in content.