Yeah I know diversity is important, but these type of links are the cream of the crop in my opinion.
Now I am not a master at SEO at all (not many people are honestly), all I can share is what works for me and proof that it does.
Hope you find it useful!
How To Rank Top 3 In The Search Engines - What Works For SEO :OmarAndWill.com
Would love to hear your thoughts!