Trying to to battle with the myriad "Well, if you don't have triple redundant RAID cards, run for monitors, and absolutely, positively *need* two optical drives, you can't possibly be 'pro'" comments on the main rumors page's threads on the Mac Pro. So - users of the Mac Pro...what do you use your Mac Pro for? What parts of the box are essential for what you do? --- I'll go first I do public health research - statistical modeling and mathematical simulations mostly. Why did I buy a Pro? - Need memory, lots of it. If I had the cash, I'd stuff this thing full of those 16 GB chips. - Decent video card for the occasional video game. - Expansion bays for hard drives - I've got my boot drive and data drive cloned with internal drives to keep me up and running if something fails. - Lots, and lots, of screen real estate for plots, code and data sets all at the same time. Went with a single CPU model though. While I can do stuff that benefits from more cores, its usually easier to just offload it onto a cluster. But some stuff is just inescapably serial, so I went with a speedy Quad-core back when I bought it.