One of Apple's most upgradeable computer, though best suited to the prosumer or professional market due to its power and price. Plenty of room to upgrade hard drives, video cards, RAM, etc. Can't be beat for pure power, there's not much else to say that hasn't been said. This thing is built like a tank! This is a Great Deal from Apple.com

• Two 2.8GHz Quad-Core Intel Xeon processors
• 2GB (2 x 1GB) of 800MHz DDR2 ECC fully buffered DIMM
• 320GB Serial ATA 3Gb/s 7200-rpm hard drive
• 16x SuperDrive (DVD±R DL/DVD±RW/CD-RW)
• ATI Radeon HD 2600 XT 256MB (two dual-link DVI ports)

This system includes Free ground shipping and a 1-year warranty.