i7 setup is too expensive right now imo. if you're really intel-minded, go with i5 or a core 2 quad.
that's a great build, but i would maybe suggest getting a better gpu if you want to be able to play all the newest games for a few years to come on max settings. i agree with viper, i'd go with a 5850 or maybe two 5850's. that would be $200USD more, idk about european prices