BPPC cards have either a 68040 or 68060 CPU installed as well, so you will be getting an extra CPU if you get a BPPC. If you don't want to buy a BPPC card you can't use BVision, and then Mediator is your only option (almost). Then you can use the Voodoo cards you mention. As a third option, you can get a Zorro busboard for your Amiga, and connect a CyberVision card to it.