I am a big time computer person who is now going to be working at home. Unfortunetly my company will not provide a computer for me but they will give me money to buy one($2,500). I am looking at a quad core or six core computer(six core because I will be running multiple operating systems at the same time so I want more threads). I would like to get a very well built computer because it will be on for probably 7 hours a day. From what I see getting a quad core mac pro will cost more than a quad core iMac. I do not understand why. The iMac comes with a great display and has sandy bridge. I would really like a six core processor and the cheapest mac pro is $3,600! ): So my coworker recommended that I get an alienware area 51(http://www.dell.com/us/p/alienware-area51/pd?refid=alienware-area-51&s=dhs&cs=19&~ck=mn). With this computer I can get a 3.3 GHz six core processor(same as the mac pro), 6Gb of tri-channel 1333Mhz ram(mac pro only dual channel 3Gb), a ATI HD 6870(mac pro only has 5770), and a 23 inch display for only 2,400! Why is the mac without a display, with less ram, with a much worse graphics card, and a much less compatible operating system over 1000 dollars more? Is there anything I am missing?