I am dropping the cash on the mac pro with the intention of keeping it for quite a few years. I am not buying it for gaming, I do that on my PS3. Probably the most advanced stuff I will be doing is high definition video editing in the future, especially when I can install a bluray burner. Other than that, multitrack music recording, photo editing, office applications, watching movies, etc. Will the different video card have any effect on the performance of these tasks? (Planning on 4GB of ram for now.) I can afford the 8800GT upgrade, but is it a total waste on me and my applications? Will the stock video card turn into a bottleneck in, say, three years down the road?