Like GPD. They seem to truly want to create a nice, dependable product (within the limitations of producing something relatively inexpensive), and are open with the gaming community. JXD, not so much. My original 7800 bought the farm after only a month or so, and despite the nice design, was "creaky". My G7, while rather hollow (they never put the Vibration motors in the handles), feels solid. Chalk this one up for GPD.
Hate those little PSP and Vita-style joystick "nibs". Much prefer the joysticks on the G5 and G7, or the mini sticks of the 7800. I think most of the community agrees on that one - making the Q9 great for older system emulation (NES, SNES, etc) not so hot for newer systems like PSone, PSP, or current Android 3d gaming. Chalk this one up for the JXD.
Which leaves me torn, and hoping for something else to show up. I would, of course, like a unit with newer specs, but if my G7 had a better screen, like the Q9 and 7800, I would be REALLY happy.
EDIT: BTW, you really shouldn't offer the Bluetooth 3.0 keyboard as an add-on item, considering the G9 has no Bluetooth capabilities (unless the keyboard also has a wifi connection).