What about the
GP2x Wiz/Caanoo (about 140 Euros)
or the
Dingoo A320/A330 (about 70 Euros)
or, best and most expensive of all, the
Pandora (about 360 Euros)?
These are all powerful handhelds, with tv-out, and all have Amiga emulators.

I myself have a GP2x Wiz and with the OLED display, it really has the "Amiga" feeling, much more than on the pc.
Though the emulator hasn't been updated for more than a year

(so if you have some time left

)