SmartQ T5 is like the JXD 301, uses the ADI Blackfin chipset, but unlike JXD, SmartQ wrote their own firmware and have been updating it on a regular basis, check out the video of the new UI, it handles GBA emulation now a lot better:
http://www.youtube.com/watch?v=5wHlXw2gJwc
we got this are...