I am interested in switching to Mac, and I have been debating on which Mac to get. I wanted some of your help. How does this mac pro compare to a new iMac Two 2.66GHz Dual-Core Intel Xeon processors 1GB (2 x 512MB) memory (667MHz DDR2 fully-buffered DIMM ECC) 250GB Serial ATA 3Gb/s 7200 rpm hard drive 16x SuperDrive (DVD+R DL/DVD±RW/CD-RW) NVIDIA GeForce 7300 GT graphics with 256MB memory http://store.apple.com/1-800-MY-APPLE/WebObjects/AppleStore.woa/wa/RSLID?nplm=FA356LL/A#overview I found that on the refurbished page for about the price of the new iMac. What can the RAM be upgraded to? Speed? Can I put in the 8800GT in this computer? What can I expect vs new iMac with 2GB RAM assuming it can be upgraded? Can I upgrade with additional HDDs? This computer will be for music, games, movies, college work (I live at home with folks, and attend online classes), and Internet browsing.