I am going to be buying one of the new Mac Pros shortly, but I cannot decide on what exact specs to get. I was wondering, how big of a difference does each processor upgrade make? I mean, would I really notice the difference between 2.8 GHz and 3.0 GHz? It seems like an awful lot of money ($700+) for 200 MHz. But I don't know, maybe it really does make a difference. And then the RAM; is 2 GB enough or would 4 GB be better? Someone told me that if I am going to have a 32-bit system, then 2 GB is enough. If I am going to do a 64-bit system, then I would want 4 GB. How would I know if I am getting a 32 or 64 bit system? In case it helps, I am mostly using this computer for everyday tasks as well as some video making and photo stuff.