I wish to build a computer that I can use to edit/mix videos as well as to run other office related apps. but I dont have 2 grand to waste. Could someone please tell me what kind of CPU/Motherboard combo I should look at for good flexibility and something that wont get too outdated soon. What type of ATX case I should go with. What things to keep in mind. I have never assembled my own PC so this is the first time.