I use a iMac now and am happy but am going to move the iMac to another room and replace it with a Mac Pro. I do a lot of PhotoShop, AutoCad and of course Office. I know many will cringe at the idea but I run Boot Camp and Windows 7 Ultimate exclusively and only will keep a small MAC partition. OK, here is my question for those who are still reading. I will be buying one of two units the standard 4 core with One 2.8GHz Quad-Core Intel Xeon Nehalem processor or 8 core with Two 2.4GHz Quad-Core Intel Xeon Westmere processors. Which should I buy. Hoping this unit will last a few years and was thinking the 8 core would be a little faster but how much? It also comes with the 6gb ram which is likely all I will need as I do little multitasking. I know either would do the job, my question is would it be worth the extra $1000 for the extra processor and 3 additional RAM. My intuitions says yes and I am getting ready to order today from Amazon who will have it to me on Tuesday for little shipping (Prime). This would save a couple hundred dollars plus all the tax! $3350 + $2.99 for overnight shipping. plus a DVI cable as I will use an non Apple monitor. What do you think, 4 or 8 core?