I recently purchased a Pandora's Box 6 and didn't really know too much about it. While researching it, I came across this site that is digging deeper into the capabilities of this pcb.
One of the unique features of the PB6 is the ability to add roms via the USB stick. They are creating a list of roms that run good on this pcb.
So if you own a PB6 I encourage you to check out the links below and join the discussion. I'm still trying to make sense of it all myself...