Advice on Computer Build

lenny why are you buying so much worthless shit

Obviously because I'll have the money...

What would you advise, then? Bearing in mind I want something that has enough power to do what I want (my current PC has 3gb RAM, a 2.4ghz dual core, and the 8800GTS, and you can hear it struggling to keep up with some of my models), something that still has room to be upgraded, and something that will last me well for three or four years at the least. I would like to see what you'd build, as you're one of the few that gives the impression of knowing what he's talking about.

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I know a few people in the US who might receive the parts that for me and then ship them... hmmm... possibility.