i probably have some money left for spending on my hobby, which is collecting and modding of handhelds, especially chinaware :p
i got 3 interesting handhelds in my list:http://www.everbuying.com/product203982.htmlhttp://www.everbuying.com/product36873.html
these two have the same os (not smp8k), which lets them play gameboy(color) and nes titles. what i know though that they can also emulate snes, though only one button works and the framerate is about 1 or 2 :p but that may be a starting point for hacking
the 2.6 inch one is a little cheaper and has more memory, however someone i know got sound issues with that one after a while, also the other looks interesting to me as well because of the design.http://www.everbuying.com/product203984.html
this one is most probably smp8k, though i dont really believe the resolution of 480x272 :p but at 320x240 (what it probably is) this would probably work much better for emulation than your general pspkox, although it lacks shoulder buttons.
i find all 3 of them interesting, so which one do you think i should get?