New computer

I am wondering what would be good for a desktop computer (Not laptop, I might get a new one eventually, an acer, but right now I have a toshiba and all my love towards laptop's are gone.) I have around 700-800$ to spend, also would it be better to go out on boxing day and buy the parts for lower the price or get better parts? What I am hoping to use it for is gaming for like TF2, Pirates of the burning seas (MMORPG),Minecraft and Terraria. Also for recording gameplay from my xbox, which I also have a easycap 2.0 usb so I can play xbox on my computer so I am hoping for a good computer to be able to game Gears of war and stuff like that too, if I can I would like to get a set-up with three screens, decent speakers (I can take care of those), a good desktop computer, and xbox capability.



Also, what's a good virus protection? I had McAfee then went Kapersky, then Neo something, and I'm not sure which one to go with.

Lmao...

Norton

its possable a mate of mine build his for 600 without a OS but only cause he knew the owners of the shop and got all his stuff really cheap soo ah unless you know someone with parts yeah good luck .

Fml. Oh well, and Norton was the one I was thinking of xD