> Perhaps APM82181 would be the best option [...] for some PPC-efika > killer ultra-low-end below 200 eur HW. (perhaps there also exist > some suitable mobile GPU for miniPCIe connector [...])
As you'd need audio as well you'd have to attach some combined (2D) graphics/audio solution to the PCIe x1 interface, similar to the SM502 on the Sam460ex ...or use the APM82181's SPI interface with a CPLD acting as SPI-to-I²S bridge and connect an audio chip via this I²S ;-)