We built a machine with pretty much the same parts (except video card), and it runs flawlessly at stock 24/24 7/7 since 3 weeks.
One thing about the Sonata III. There is complains about a ground problem with the front panel. Some experience hard reboot when they touch it or plug something in it. We haven't seen such problem yet.
We run 2X2GB of Crucial Ballistix with no problem. We haven't experienced with 4 sticks though.
I'm not an overclocker yet, so I can't comment much about this.
KBits, you say you have 2x2GB of Crucial Ballistix on a GA-EP35-DS3R board ? I'm happy to hear they work on this board, since they weren't in the official memory support list. I would like to get my hand on one of those kit but it's more than twice as expensive to get 4 GB with a 2x2GB kit (105$) than 4GB with 2x 2x1GB kits (2*20 = 40$ before shipping). So, is it really worth ? I'll have to weight this down (also, the problem if i go with 4 memory module instead of 2, i won't be able to further upgrade in the years to come. Who knows.). Also, there's the overclocking potential loss of getting 4 modules instead of 2, but since i don't expect overclocking much higher than FSB1600, i don't know if it would really cause a problem.
Anyway, thanks for your replies. Anyone else has something to say ?
Parts are mostly okay. The 8600GT isn't really much of a gaming card. Even though you only game a little, if you want to be able to play some of the more current games you should see if you can fit the budget to upgrade to an 8800GS (eVGA preferably) or a 9600GT.