Thats basically what I want. A motherboad that has 4 slots for 4 GB of RAM with 1 GB sticks.
What would you recommend and where would you recommend buying it?
I still recommend either Newegg or TigerDirect for most components.
If you get what you want selected FIRST, then pricewatch.com is a good way to find shops with good deals. Usually you're best off using only one or two vendors to keep shipping costs down.
As far as recommending a mobo and processor to purchase, as well as your RAM, video card and hard drive... well, that's all highly dependent on your tastes. For many cases it is like the difference in Coke and Pepsi... some prefer one, some the other.
1) Is to decide which route to go on the processor, AMD or Intel. The Core 2 Duo processors are currently the fastest on the market, but AMD just made a price drop in the last few weeks on the Athlon 64 X2 to make it more cost competitive. Check out a nice comparison article from Anandtech.
AnandTech: Intel Core Duo (Yonah) Performance Preview - Part II
If these are too rich for your blood (aka your budget) I would look more at the Athlon 64 line, although others would say look at Core Duo first.
2) Once that selection is made you need to decide on the chipset you want your mobo to have. Intel, Nvidia, ATI and VIA all make chipsets for the Core 2 Duo... Nvidia, VIA, and ATI all make chipsets for the Athlon lines of processors.
3) So you've decided on a processor and its corresponding chipset, so which mobo to choose? Yet again, there are about 10 flavors of vanilla here. All I can say is to stick to a major manufacturer (Abit, MSI, Epox... someone mention any I missed) and check their website for what options they offer with your selected chipset. The common denominators are number of expansion slots (PCI, PCI-X, AGP, RAM) as well as on-board LAN options, or even whether or not there is a SATA controller onboard (finally a highly common thing). I had an MSI in my machine for a very long time and was happy with it... it died around Christmas and I moved to an Abit, which I am also happy with.
4) Choose between ATI and Nvidia and grab the video card that hits your price point. One thing to double check here is that if the card is PCI-X, the mobo you selected better have a PCI-X slot, conversely if it is AGP, your mobo will need an AGP slot.
5) As Dr. Rosen says, get good RAM. You will be able to find the supported RAM speeds in the specs of the mobo you selected, and try to get the quickest supported. There are a few major manufacturers of quality RAM, including Corsair and OCZ.
6) You'll need your other peripherals such as DVD-R, hard drive, case and power supply, keyboard, mouse monitor, etc.
Good LUCK! As you can see, building your own computer can be a very deep customization procedure. The site linked to above, Anandtech, is a good source for quality in-depth information on most of these topics. Often I skimp on the quality of components because I'm a risk taker, but to not risk being liable if you aren't happy with the performance of the machine you build, I say get good stuff.

:lol: