Well, I finally decided to give in and get my Mac Pro today. I had an Apple gift card from the return of a faulty 27" iMac unit, so I decided to go with the Mac Pro now. I found a great refurbished 2.93GHz Quad unit on the Apple Store online, and I decided to purchase some upgrades from OWC. I am adding 16GB of RAM, a 120GB SSD, and 2x1TB Hard Drives that I plan to setup for a RAID 0 array. I have confidence that my machine will scream. Since I am getting the 2.93GHz one, I don't think there will be any need to upgrade the processor to the W3580 right now, as I had previously inquired about. Also, I am not yet sure what I am going to do about the video card. It ships with the stock GT 120, but if performance is too lackluster, I might decide to upgrade to the 4870 (probably get a used one on eBay). I found this machine for $2,549.00 on the Apple Store refurb site, and I'm adding $1140 worth of upgrades (from OWC) to it, so roughly a $3700 system out of my pocket, which would have cost me over $5200 if I had confirgured it new on the Apple Store site!! So at least I am saving quite a bit of money this way, and still getting a fast machine! I look forward to getting my new Mac Pro...it should arrive by Friday, or next Monday at the latest. Finally, I'm getting my Mac Pro!!