I used to use both platforms but switched over completely to the mac. I was having to many problems with the particular PC that I had and had to replace it with something else. As far as Vue, as stated in the other messages, they are almost identical. I have a G4 dual 1.42Ghz with 2GB Ram. I use this machine for all things Vue, setting up and rendering. Rendering is slow but thats because my scenes tend to get complex. Usually around upwards of 500mb to over a gig in file size. So far it handles them real well. So if you go for the G5 and use it for Vue I would think you would be happy. Then later on if you can spring for another machine of some sorts and do like the others as far as a render farm. I would love to do that. Hmmmm, a room full of Mac Mini's...... :-)