DDR3 is not worth it. Get good quality plain jane 800 MHz DDR2. At a clock speed of 400MHz, your memory will be running at it's designed speed of 800MHz, and your Q9450 will be running at 3.2GHz.I do backup for every shoot onto DVD and off site so I'm not terribly worried about losing stuff. It would suck though, don't get me wrong. I've never had a HD failure. (knock on wood) I'm all over the place on this build. I don't want to drop more money than I really need to but I want something that will work well for 3-4 years. PC's are so much faster now compared to my P4 that anything will seem like a huge increase. So I guess in a nutshell I don't need or want to RAID. I do want to overclock a little. Not anything extreme but I'd like to hit 3Ghz. I may actually just go to a 7200RPM OS drive to save some money. And finally is DDR3 @ 1333 worth it? Will I actually notice the difference?