I recently had this exact discussion with a guy in Edmonton that plays and also works ata a hobby shop. He said blade connectors like the one above are a bad idea(very low current flow comparitavely). His recommendations were either bullet connectors with shrink wrap over them to prevent shorts, or Deans micro plugs like this
http://www.wsdeans.com/products/plugs/micro_plug.html
I went with the micro plug, havent finished it so I cant give you a review, but according to him it can pass almost as much current as a regular deans.