I went with this one:
This guy Tom manufactures the bracket and builds out the custom harness for your specific application. On the GS it positions the Centech panel forward against the airbox which both frees up the tool kit area and makes for a cleaner install as most wires will be coming from forward of that.
Best part is the "wow, this is a nice piece of engineering" I felt when I took it out of the box. Makes for a very professional install.