I am about to get a Mac Pro. I have an option to get a new one with about 10% discount through my office or to get a refurbished one at about 15% off. I know that 5% may not seam a lot but with the current MP prices, it means an extra HDD or a video card. At the same time, if I am spending over $2K I do not want to get "used" stuff. So, my question is - have anyone purchased refurbished MPs? Are they worn or they look like new, come with all the packaging and etc? Keyboard, mouse... Any known issues with refurbished products? I am looking for either the basic 4 core config or for the basic 8 core config.