New build, would like some approval/advice.

Hey guys...

I'm currently in the process of building a new system, and therefore would like your opinions on it. I will be adding a liquid cooling system at a later date, so I will be doing some pretty good overclocking on the cpu, ram, fsb and maybe graphics cards. I'm bringing a Creative X-FI Elite Pro soundcard over from my current computer.

I will be using the computer mainly for gaming on a 1920x1200 resolution, but I also do 3D Rendering work and graphics.

Here is what I've got so far, I havent listed any retailers or prices as I am buying this in Denmark.

Case: Lian-Li PC-A7110.

Motherboard: Gigabyte GA-X48-DQ6.

CPU: Core 2 Quad Q6600 8 MB (Intel Boxed) . (Should I be going for the Q9450 instead, considering I will be overclocking?)

RAM: 2x PDP PATRIOT 2 x 2 GB, resulting in a total of 8GB DDR2. (I'm not to sure about the RAM, these are the ones I came up with after reading around)

GPU: 2x Radeon HD4870 in CF. (I haven't decided on a manufacturer yet, waiting for the cards to land in Denmark)

HDD, System/applications: WD VelociRaptor WD3000GLFS 300 GB. (I know it's pretty expensive, but unless it's totally useless I don't mind spending the extra money)

HDD, Storage/other: Seagate Barracuda 7200.10 750 GB.

Optical Drive, Blu-ray burner: LG GGWH20L Super Multi Blue.

I haven't decided on a power supply yet, anyone got some recommendations?

Thanks for your help.