Well, that Gigabyte mobo comes with the onboard Realtek ALC889A sound chip. Wich are actually pretty good.
But if your bro, are an Audiophile, with higher sound quality demands? Then I suggest this card:
http://www.overclockers.co.uk/showpr...tid=11&subcat=
This is'nt too chabby either:
http://www.overclockers.co.uk/showpr...odid=SC-002-AS
I don't think you want to list the XFX HD 4850 really. Mediocre cooling. Will run hot, as that XFX cooler is very similar to the ATI reference cooler. The extra 512mb on that XFX wont be of much use really as soon as you hit a monitor resoloution over 1024 x 1280 or 900 x 1400 wide screen res. This as the memory bus are only 256 megabit. That will cripple the memory performance over said resoloutions. 1 gb / 256 megabit cards are more or less a sales argument really.
This instead:
http://www.ebuyer.com/product/159709
You're welcome.