I have a Procede Rev2 that I bought in July 2010 and have had it in the car for two short 2 month stints.
It is a Rev 2a with V4 maps loaded and I have never run V5 maps b/c I really liked the V4 autotune maps. THIS MEANS YOU CAN UPGRADE TO V5 for FREE.
To run the aggressive maps you can upgrade to rev 2.5 for $50.
USB cable included.
Asking $425 shipped.