Okay, so this is a bit of an update. I've chatted with a couple of friends, asked around and come up with this set up. I have decided to scrap my old PC and not to reuse anything (except for external components like monitor, keyboard and stuff like that).
The case, this is a pretty good looking mid sized tower. The Thermaltake Commander MS-I. Looks awesome, has a decent number of vents and mesh parts. The little see-through window on the side is also goes easy on the eyes. I'm going with this purely for the looks and ventilation options.
The motherboard. Still going with the ASRock 970DE3/U3S3 as it's fairly cheap and I'm getting the most out of my cash.
Ram CORSAIR XMS3 4GB (2 x 2GB). The reason to go with 2x2 was to better handle loads and heat issues (or so I was told). The motherboard has four slots, so I can easily upgrade and add more ram if needed.
Processor AMD Phenom II X4 965 Black Edition Deneb. I don't know why I vent with this one. I generally know a few things about tech, but not about CPU's, so this is kind of random. But hey, the pricing is good and it doesn't look half bad.

I'd thank TheDarkness (SC2) twice if I could, as s/he advised me to use this, as did a few other people.
PSU - I have no idea at this point. I'll probably go with something by OCZ technology or Corsair. My best pick would be this one
VGA -

I don't know, this seems to be everything I need and it fits within the frames of my budget.
HDD -
So that's about it, and that brings me to a decent amount of 608 USD or 495 Euro (price my vary due to odd pricing in my country)
What's your opinion on my "build"?
Thanks in advance.