crazyguy_60 :
OK, as a matter of fact, the E8400, the E7200 and the Athlon 64 5200 where the processors I was thinking about. But I think I'll go with an E8400
I've decided on a P5Q motherboard, as I have heard that they are very good.
Finally, I would like to know why you don't think 2GB is enough RAM.
Hey mate!
The E8400 is the best choice of all for gaming. It overclocks easily close to or above 4GHz. is dual core and has 6MB of cache 2 (3MB per core). It is also quite cheap and affordable, although the price has gone UP the last 1-2 months since they are selling like hotcakes!
Anyway, excellent choice!
Regarding the RAM, it is not that i believe that it is not enough, actually 2GB is right on the limit where you could see a difference in your games.
Most games will not even touch anything above the 2GB limit, hence you are quite safe. Crysis is beginning to change that with accessing as much RAM as 3GB+ easily. Although it will use that RAM, if you are playing in lower resolution and settings you will not see much a difference. BUT in higher resolutions and settings it might make the difference between 28 and 34fps. Now that might not seem much, but it helps you get more than 30fps and will make your game seem more fluent, with less sags and "freezes" in the game. Hence helps the actual immersion in the game. Less "stuttering" etc etc.
The other reason i would suggest getting 3-4GB of RAM would be if you sometimes want or need to Alt+TAB your way out of a game for whatever reason (answer MSN, run a trainer program to cheat in the game, etc etc.). With 2GB it might take you up to 30 seconds to see the desktop. With 4GB it will only take you 2-5 seconds max.
As you can see it is not necessary to upgrade the RAM, but it will help your system to become much more "fluent". But i lived with 2GB before and jumping to 4GB did not make a big difference in games. Only the desktop in general and multi-tasks have become much more fluent. Hence you can leave that upgrade for later on. You can try with 2GB first and see if you are happy. If you are then stick with it.
Enjoy your new system!