I need to build 2 more CAD rigs within the next week. I've been building AMD X2 rigs, but with the release of Core 2, I'm torn between the two. I'm going to post this in the Intel and AMD sections, because I honestly don't know what would perform the best for this type of application. These rigs will only be used with AutoCAD 2007 and MS Office. I must have a Quadro FX1500 (599ish) and 2+ gb of ram. We already have the monitors. My budget is $2000. So, Intel guys and gals, what should I build?