Any processor is good enough. For games an AMD Phenom II X4 630 2.8 ghz is just as good as some Intel i7 965 monster. It's not like the late 90's early 2000's when you needed a new computer every couple of years and not just a new video card. Hell my 'ancient' Core2duo 6400 2.13 ghz, is still good enough for all games, the limitations of the most demanding being due to video card.
Check out most hardware reviews. The serious ones will show that processor difference only matters for 10 FPS or so when the systems have the same video card, unless it's an old game, but then why would you need a super computer to play an old game anyway?.
The one you picked is more than enough, but like others have said, AMD is very cheap, so just to be safe get a quad core AMD.
Memory is cheap these days but seems to go in cycles so get a lot of it if you can but don't go crazy. For games you won't need more than 4 gb for years, but get a bit more if you really want. People that argue for more RAM obviously don't know what they are talking about. Single task gaming doesn't need more than 3gb RAM as you can see here:
http://www.tomshardware.com/reviews/...de,2264-3.html. For symmetry's sake get 4 gb RAM and use the money saved for the video card.
For a videocard if you are budget conscious then a ATI 5750/5770 is best value.
I tested SH5 on my Core2duo 2.13ghz, 2gb RAM, ATI 4770, and could run it smoothly when there were no massive explosions from burning ships at 1600x1200 with every detail on maximum. With explosions it got to be a slideshow, so I had to lower AA and shadows for combat situations, but really that should be a guide as to the minimum you need to get the game mostly playable on max details.
You have an onboard video I see. It's fine for older games pre-2004, but no good for modern ones. Even the cheapest video card you can buy would be better!
For memory for the DDR3 variety, well they are similar in price and so you may as well get a 1333mhz version. As I've said 4 gb is more than enough, 6gb or 8gb is just pointless. By the time games will need it, the whole computer will be obsolete anyway.