I would like to have, mobo with following features :
A1200 and A4000 CPU slot, so that any A1200 / A4000 accelerator would be useable.
At least 4 Zorro II / III slot, so that Zorro mode would be selectable, no matter wich accelerator is used. I mean Zorro III mode should be availlable even if A1200 accelerator is used. Should be doable, RMB did it as a prototype.
At least 2 active PCI slots. But Zorro slots are more important.