SoBi Pro is great... but misses some basic features, as adding a prefix to a field (might be as simple as willing to add the "dollar" signe as prefix, and not as suffix), and the templating is powerful - but criptyc even for an average Joomla developer. Recently I had to build a site wich had a special need - to display the last 4 digits of a person's Social Security Number, in the format ***-***-1234.