I am thinking of building a computer. For minecrafting(potentially VERY MOD-intensive, possibly even a small private hamachi server for friends and maybe for videos requiring groups), some other gaming as well, such as skyrim, and halo. I will need to be recording, for YouTube as well. Max budget: $800 (USD). What would be the best setups for this?! I know little about computer building, so I am very open to suggestions, as well as any advice or info you might have on computer building to help me.

Thanks everyone!

Jason