I am one week away from buying my first mac. I am a windows switcher and can not wait to get a mac pro I have not decided weather to by the machine from the online Apple store or the local store. Can the local store configure the machine the same as the online? I am considering going with the single CPU. I have read all the treads on the forum and for the most part there has not been shown to be a major performance decrease. Feel free to correct me. The video cards is there a big difference between the ATI standard card and the 8800? As far as ram and hard drives go it seems far better to buy Them from other vendors and not Apple. If I have missed something or have misinterpreted anything please let me know it would be greatly appreciated.