Yea there will always be new technology out but i'm on dwarf's side, if he keeps updatin it the comp he will be fine. But think of one thing, hardware technology increases really fast, but how long have we had dual-core CPUs? like a year or so, and how many programs do you see fully utilizin them..... The point is, hardware tech will keep increasing but software tech cannot keep up. I say as long as you can play games in good quality you'll be fine. Its goin to be a while for software to utilize dual-cores because the average consumers still have single cores.
But awsome build, wish i had that amount of money to build a comp (but i prolly would only spend $2,000 on a comp, save the rest for my Mastercraft X-9