I for one would get an SSD for your O/S: one of these click here or this click here
You do not mention your GPU only the 3D kit.
Sound card, that is really up to you.Onboard sound has come along way and a seperate card is not really needed.
As for Ram you do not mention what O/S you will be using and whether it is 32/64 BIT but have a look here click here for compatible RAM and click on memory support list.
Your case hase pretty poor out of the box cooling so I would have a look at the Coolermaster Haf 922/932
I would go for one of these instead of the CPU stock cooler click here