I am going to be building a new desktop here in the next couple days. I have never built a computer before but my girlfriend's brother has and will be helping me along the way. I have a tough assignment for you guys...I work at an architecture firm and use Auto CAD and google sketchup mostly but will be doing some casual gaming also. I was orginally thinking the AMD A-10 processor but am looking at intel i5 - 3470 as there is a sale in my area for $150 instead of $200. I am looking to spend between $550 and $650 for everything that I will need. Possibly $700 but I'm not sure. Please let me know what the best build would be for me with either the Intel or AMD processor and being able to run CAD and Sketchup smoothly along with gaming and movie streaming. Than you all in advance and I look forward to hearing what I can build!!!!!!!!