A lot of people will advise you to go down the Intel i5 / i7 route and if you have the budget to do so it is a good choice.
However Phenom II's are good CPU's and obviously the setup you build will save you some cash too.
Most of your component choices are good - with the exception of the PSU. There is always one name on the top of everyones list for PSU's "Corsair" They tne to be a little more expensive but give you plenty of scope to upgrade your PC at a later date.
I would shop around on the video card - there are plenty of good deals on the 4870's since the launch of the 5 series.
Thanks for your answer
I haven't decided yet, I think I will go for an Intel i5 with a good Motherboard and bye later a good video card with dx 11 and so ...
Could U suggest me a nice i5 with a respective good motherboard and 2Gb ddr3 ?