CVF is the best choice in my opinion.Because it's the most stable just make absolutely sure it KD.If you choose fir.
Ive been wanting to do the same with my shop. Please post some pics when your done.
The answer was only hinted at here. Card edges can groove your soft stones. This is the big reason to joint with a file. You can do it with a stone, but that cuts into efficiency when you need to dress the stone.
The burr is because of the mechanics of usage. You do not shear cut the same as a knife edge will turned around the other way. You technically can get by without a burr if you have a sharp edge. Again, the burr is more capable and therefore more efficient.