My friend wants me to rebuild his computer. Currently he has a 939 socket Asus A8n32-sli deluxe motherboard, an AMD 4400+ CPU and pc 3200 ram. Everything else is worth keeping. He is not a gamer and mostly uses the computer for internet browsing, word, excel and AutoCad/ LDD. He is giving me a $200-$300 budget to purchase a mobo ram and cpu. It would be great if he could get a quad core but with the budget it doesn't seem plausible. If he were a gamer I would get an intel set up but he not so i'm not sure if a phenom set up might be worth it for the cheaper multi-cpu performance. Please help me with some suggestions.