Need help choosing parts for new pc

I'm thinking of buying a new desktop and putting it together myself - first time
I only play Counter Strike 1.6 but may play more games in the future - so would need an-ok graphics card.
I also need a monitor preferably widescreen. I have a budget of £1000 and will be ordering from www.ebuyer.co.uk unless anyone knows a better website.

So far I've been thinking of getting:

Intel Core 2 Quad Q6600 Processor and OCing it to 3.0 GHz

9800GT 512mb
http://www.ebuyer.com/product/1504 [...] t_overview
or
http://www.ebuyer.com/product/1484 [...] t_overview

Samsung SpinPoint F1 750GB

OCZ
http://www.ebuyer.com/product/1329 [...] t_overview
or
http://www.ebuyer.com/product/1460 [...] t_overview

Everything else I've no idea on...

I'm not sure whether I'll need a soundcard - but I also need a set of speakers(2.1)

if you are dead set on using a 32bit OS, then get 2gig ram. If not, 4gig will do you wonders.
I suggest an HD4870:
http://www.ebuyer.com/product/147243
It'll last you longer than a 9800.

For the PSU, antec neopower 550w should be plenty.
http://www.ebuyer.com/product/99138

motherboard P45 for a single card (with the option to add a second vid card) P5Q Pro:
http://www.ebuyer.com/product/145751

Get whatever case suits you visually and you should have a pretty good deal.

Both of those mobos are reputable and should fly with the Q6600. The 9800GT is good enough for the monitor but you can't add another card for SLI with the mobo. You can probably find a 9800GT with a free copy of Farcry 2 or something too.

+1 for the HD 4850. Actually, with that budget you should be able to get even a HD 4870. Get a Corsair 650W or 750W power supply, and then you'll be able to add a second card when you need it.

You don't need a sound card.

Between the P5Q Pro and the UD3P I'd pick the P5Q Pro because it has more SATA ports. If you're not a major space hog and can live with a burner and 5 hard disks then the UD3P is perfect too.

Oh, and will I need any more fans in the case?