Which PAID tool do you recommend best? AHREFS, MajesticSEO, OpenSiteExplorer, ... ?

• ahrefs

• MajesticSEO

• OpenSiteExplorer (OSE) from seomoz

• blekko

• other?

Which one(s) do you use?

Which one(s) do you recommend?

... Budget is up to $100 per month for tools... must pick only the best one for checking backlinks, link-profile, follow, nofollow, anchor text, keywords, etc... tried the FREE demo versions of these, but cannot really decide which one is best...


Any GOOD case studies, done recently, in the past FEW months?

EDIT:

What do you like most about the one(s) that your prefer MOST?

 

Here us a recent case study that I just found:

September 12, 2012:

Comparing Backlink Data Providers

http://www.seobook.com/comparing-backlink-data-providers

Compares the databases, APIs, but not the U/I and reports.