Get ATi cards since Nvidia is always more expensive then ATi. But what most people do they get Nvidia card for UDK. PC Casing. I do see some people spend like 300 USD for a PC casing with nothing inside except for the fans... So get a cheap and average-big space casing. Anyway why spend so much on a casing when is sitting at your house no one can see it. Unless you decided to carry your desktop around Processor. Well AMD and Intel, they are both very good but Intel is better for working on software and they are much more cooler then AMD but come with a price. Not only that, Intel Processor needs the right Motherboard depending on the Intel Processor Socket and their motherboard is not that cheap. Unless you are going for AMD processor and AMD motherboard socket. Since AMD processor and their motherboard are much more friendly then Intel and they are also cheaper by alot. But AMD processor can heat up quite fast and sometime hotter then Intel processor. If this PC you are using try to savage what ever you can, like um DVD room, harddisk, and ram.