need new sound card for gaming

[Rabbit08]

hi guys as it says going to upgrade my sound card for gaming ,i have got a budget of £140

tower space i have 4870x2 an 4 sticks of ram on asus rampage formula x48,
i am using the asus superfx sound card at the min an the case is a antec 1200 gaming case.

so just want a hand on what card to get cheers

 

[Rabbit08]

cheers guys , i have the creative fatality headset at the min ,an dont use speakers at the min

 

[Rabbit08]

just i need a mic for comms ;(