The only PCI busboard that fits inside the A4000 and has a video slot is the G-REX.
Elbox already have lots of PCI solutions, but I really wish they had a one that works inside the existing A4000D case and with a video slot! (I want the world too ;-) )
3 PCI and 3 Zorro3 would be plenty:
Zorro stuff
Cybervision 64/3D/Scandoubler (Uses the Video slot)
USB card (like the Highway), with Ethernet dongle, scanner, printer etc
Maybe Catweasel
PCI stuff
Voodoo card for the 3D games 'n' stuff
Sound card
Maybe Ethernet or alternative USB?!