Well you cannot get a IIIr unless it is used, and DynoJet is trying to phase them out in favor of the USB model.
I have the same 'Busa and setup as you do. I went III USB for one big reason: It asmples the A/F and sets it twice as often as the stocker.
Instead of every 500 RPM (IIIr) it sets it every 250 RPM (III USB).
Also, the free Accell Pump software upgrade works on the USB only, and some other plug in toys are on the way they say.
I have been tweaking that Map for even better performance. Once you are installed, you are welcome to try it out if you like. Let me know and I will mail it to you.
