I vote for these:
Alternative1:
- 68k built in FPGA, on a CPU slot compatible card (natamiguys can deliver their future 070 chip code for that)
- can be changed to a PPC accelerator by programming the FPGA again
- no need for that stooped x86 dongle-kludge-box beside the Amiga
Alternative2:
- AGA or Minimi or Natami GFX chips on a 3.3volt PCI card, then the 68k can be emulated by the host CPU.
- would be interesting & usable also in SAM440
... I might buy both :-P