If You Could Have An Amiga Replacement Mother Board

[PPC]

If there is one model i would like to see it's an A4000 Mobo in ATX form factor with pci and pci express slots (for cheap and modern cards) with the custom chips in emulation on FPGA chips.
Two zorro 3 slots for using our old cards would be nice!

The big problem with this is what to do with the 68K processor.

I do not know if 1: any FPGA is fast enough to emulate a 68K proc as fast as a real 060 or better.
Second to that a PPC PCI card PPC expansion so you can run OS4 also on it (cresendo/shark ppc cards ?!?)
And the 3rd problem is can anybody write decent drivers for new hardware in a reasonble time.