What should i upgrade ?

If you want to do gaming,then upgrade your 9600GT, your CPU and RAM look fine.What's your power supply ? and what resolution do you play at ?

Also, how are you on disk space? Fast, large HDDs are getting cheaper (and better) by the day and makes for a nice upgrade.

I agree with Maziar that the GPU should be your priority. In addition to his questions, how much do you want/expect to spend?

Agree, upgrade your GPU...

Yes, we need resolution, PSU info and budget.

Well I will buy a new PSU 550w because i need a 6pin conector
The resolution i ussually play now depends on the game if its not so demanding i play on 1680x1050 if its demanding i play on 1280x800
I am thinking abou buying this card:
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
but im not buying it from newwgg because i will buy it from my own country and here the price for this VGA is 196 bucks

Oops I nade a lot of grammar mistakes sorry I was in the hurry when i was writting.

The HD5770 is a good choice for 1680x1050 and a 550w PSU should be fine.

HD 5770 is a great choice and can handle games fine on 1680x1050