~$1300 HD4870 build, need final advice please

So, after being out of the loop for the past few years, I've decided that I finally need a new computer, and now seems like a pretty good time to build one.

What I already have/ordered:

Monitor: Hanns·G HG-281DPB Black 28" 3ms Widescreen LCD

Case: Antec Twelve Hundred

Power Supply: Corsair CMPSU-750TX 750W

OS: Windows Vista Home Premium 64-bit

What I'm planning on ordering:

Motherboard: GIGABYTE GA-X48-DS4

CPU: Intel Core 2 Duo E8400

RAM: mushkin 4GB (2 x 2GB) DDR2 800

GPU: Radeon HD 4870

HD: Western Digital Caviar SE16 WD6400AAKS 640GB 7200 RPM

Optical: ASUS Black DVD Burner


Heatsink: Xigmatek HDT-S1283 120mm Rifle CPU Cooler, with retention bracket, and Arctic Cooling MX-2

TV Tuner: Hauppauge WinTV-HVR 1800 MCE Kit

Now, for my questions:

1. The one thing I'm really unsure about is the motherboard. I'm thinking that in the future I may want to get another 4870 and Crossfire them, and I know X48 would be the way to go, but just unsure if this motherboard is the one I should get. Also, I would like to try overclocking the CPU, RAM, maybe video card, and not sure what the best mobo for that is, either. And if Crossfire in the future is a bad idea, is there a P45 board I should look into?

2. For the RAM, I just chose 4GB of DDR 800 that had the lowest timings at standard voltage (5-4-4-12 at 1.8V). Is there a different brand that would overclock better, and possibly give me better performance overall?

3. For this computer, loudness isn't an issue (notice the Antec has six fans). I play games with earbuds, and can't hear my computer at all. I also want to get the computer as cool as possible. Are there any case fans I should be getting that will really help with cooling?

I think that's all my current concerns. If you can help, I'd be really thankful.
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More about 1300 hd4870 build final advice please
  1. Good motherboard you pick. I suggest staying with it. Your RAM is good, make sure it's on the motherboards list of compatible RAM first to be sure. I honestly can't tolerate loud computers, and don't recommend buying more fan than the case comes with. If it comes with intake fans as well as outtake, that's plenty.
  2. No idea about that tuner. I have an older Hauppauge model (PVR-150) for regular TV and it's great.

    The rest of the build is excellent.

    Yes, the GA-X48-DS4 is a good choice. It can bring the E8400 to 4.2 GHz for example. It's also perfect for HD 4870CF. You should consider CF with that monitor, it's a good idea. Your PSU and MB and case are fine for it.

    Fans: SFF21F sounds best for you. 30dB/1600rpm.

    Good RAM. There may be better choices, I don't know, but the one you picked is good and has a very nice price.
  3. May as well pick up the e8500-OEM Since you're going with a HSF and it's only $30.00 more.
    That's a great motherboard for overclocking and Crossfire and with a monitor of that size you may need Crossfire in the future to optimise performance.
    I really like these high CFM Scythe fans
    nice build btw, i'm jealous
  4. you seem to keep your systems for a long time... i'd recommend upgrading to a quad core because it will last longer even if it doesn't have immediate advantages today (it does though)
  5. With this nice setup I think you need 8GB of better memory like 2 sets of this one
    Mushkin ASCENT XP2 4GB (2x2GB) XP2-8500
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