Chris Akins
Owner, Akins Creative
I invested early in Sridhar Katakam and later, by extension, Davide Browne. Their tutorials and plugins will take your design to the next level while also adding to your coding repertoire.
Also, Sridhar and David are two of the smartest guys in development and just good and decent people.
What you invest in WPDevDesign will easily be returned to you ten-fold.