Using a PCI setup is the same as using a CSPPC card, they were not in Amiga's plans and are not "original hardware," but much of the appeal of the Amiga (and many other systems) is the ability to adapt to the user's needs; I call this, "Wouldn't it be cool to..." This is the same statement that gets us in trouble as well -- usually with a significant other.
With a PCI configuration, one is only limited by the software drivers for the card, not the hardware development.
Again, only in my opinion.