RAM
DDR3 prices seem to have bottomed out and are holding steady at around $25 for 2 x 2GB kits and $35 for 2 x 4GB kits. While it might be tempting to spend $10 more on an 8GB kit of DDR3, 4GB is more than ample for basic to moderate multitasking. If the system will be used for extensive multitasking or for applications that benefit from lots of RAM like Photoshop, you might as well spring for an 8GB kit. Both Mushkin and GSkill offer 4GB kits that are usually less than $30 shipped. While these appear to be unremarkable budget memory sticks, my testing indicates both are capable of undervolting to 1.4V (from the default 1.5V) while running at stock speeds, and both kits can be modestly overclocked at the stock 1.5V setting. Additionally, GSkill's budget 8GB kit was capable of modest overclocking (though not undervolting).
Hard drives
As alluded to earlier, prices on hard drives have risen lately in response to flooding in Thailand and other areas of southeast Asia. In my previous buyers' guides, I've recommended 500GB drives that were available at every day prices of $40 shipped. Unfortunately, $40 500GB drives are not currently available from any of the major US internet retailers. How long these elevated prices will persist is anyone's guess, but from what I can gather, the supply disruption will last at least a few more months. It's possible prices will continue to rise, but for now, it's difficult to find 500GB drives for less than $50 shipped (day to day pricing). As much as it pains me to say it, you can save a few dollars by going for smaller capacity drives. For many basic users, 160GB might be enough storage space.
