Help with building Gaming Comp

First off, Gooday all!

I'm starting to put a decent gaming computer together, so far I've picked out a CPU, Motherboard and RAM and need suggestions on a Graphics Card.

This is what I have got so far:

http://www.ebuyer.com/product/142433 - RAM
http://www.ebuyer.com/product/141600 - Motherboard
http://www.ebuyer.com/product/139967 - CPU

I'm only looking to spend about £400 Max, I have a monitor, Harddrive, keyboard, mouse etc from my old computer. If these are faily decent componants for the price then my only suggestion is what Gfx card should I go for, looking to spend no more than £150 - 200. Any suggestions for what could replace what I already have got would be appreciated if I've gone off the track.

Many thanks in advance.

Also look at this Sapphire HD 4870.
http://www.ebuyer.com/product/146415

You'd end up spending £450 instead of £398 in total, but it's a faster video card and I think it's worth it for a gaming PC, especially since you won't have the Crossfire option with that motherboard. It also has a dual-slot cooler, which is a very good thing. I hope you can afford the extra £50.

Sorry just one more question, if my chip is say 1333MHz Max Speed Bus, and I get a motherboard which is the same, If I was to overclock the chip will the FSB need to be highier on the motherboard than the chip? or is it not effected?

Sorry, this is probably a complete noobie question.

The GA-EP43-DS3L has a native fsb of 1600. The E8400 the same, and a multiplier of 9.
Run the RAM at 400MHz i.e. no overclocking, and you should get 3.6 GHz.

But, to actually stay stable without overheating at that frequency, you need a high-performance cooler. The Freezer 7 can do about 3.2 GHz AFAIK.

These two for example are top performers, especially the Noctua, and they're very quiet too. I have a Ninja myself, in fact.

http://www.ebuyer.com/product/127437 Scythe Ninja-PLUS Rev B, £33
http://www.ebuyer.com/product/147097 Noctua NH-U12P, £43

The problem with them, apart from price, is that they're huge and you need to make sure they fit in your case. They're also harder to install than the Freezer.