I have been building my home PC for quite a while, however when it comes to workstations and Server PC I still got a lot, and I mean a lot, to learn. I am a casual gamer, and i'm interested in building a server PC for me to host games like Counter-Strike: Source, Unreal Tournament 2k4, and Call of Duty simultaneously. I'm not sure where to start. For instance should I go for an Operton build or a Xeon build. How many RAMS, hard drive space, etc? Any input will be appreciated.