Ive had in my A3000 a PIV, a CVPPC and the GVP cards before getting a Voodoo and a Radeon 9200.
If you have a Cyberstorm accelerator with the mini PCI bus and a CVPPC on it there is no question its the best choice hands down, if not the value you gain in the end with a Mediator is hands down the best. Once you get all the drivers going and playing together its an amazing system.