Hi I was reading different reviews on internet for tha last 3 hors and I am so confused. I am an architect and I will be using the laptop for 3Ds Max modeling.static modeling.No video making but complex scenes with lots of lights and materials which need to be rendered in huge dimensions. Photoshop for composing my presentation tables,A1 and A0 size with lots of layers. Autocad 3D. I prefer to buy an HP since I was very satisfied with the other 2 old HPs I had. My budget is around 550 $,I know it's not enough but this is what I can afford for now. which parameters should I consider for CPU and graphic card and RAM? I have several external disks and don't need the internal disk space to store files. should I choose core...quad...intel....?