Minix finally release the official android 4.4 kitkat firmware for their neo x7 model.
Please note: It is hard to flash back to Android 4.2 OS if you flash this android 4.4 kitkat, the boot loader is not the same. Please flash this firmware just when you are ready.
Firmware Download link is here
You need the RKBATCH TOOLS to flash this firmware.
and here is the XBMC minix version for download:
Get the original NEO X7 here: