What should i buy of new part?

[darkzombie]

Well i got abit money to buy some new part for, because i had a soundcard "pre-lude 7.1" that was fucked so i was told by Auzentech to send it to USA, as i did and then they said they won't refuse it because i had bought it off a reseller (and they knew i had that) so i had to pay for sending the pack to USA and then get it back >.> thats alot of wasted money...

Anyways, i want a new part for my computer then but dunno really what to upgrade?

I got a sucky pc:

Sound Card:
Inbuild @ Mortherboard

CPU:
Intel(R) Core(TM)2 CPU Q9450 @ 2.66GHz

Motherboard:
Gigabyte EP45T-DS3 - Intel(R) 4 Series - Chipset

Operating System:
Microsoft Windows 7 Ultimate [64Bit] Version 6.1.7600 Build 7600

CPU Speed:
Intel(R) Core(TM)2 Quad CPU Q9450 @ 2.66GHz, 2667 Mhz, 4 Kerne(r), 4 Logisk(e) processor(er)

RAM:
8.00 GB DDR3 - Cossair (2x 4gb)

Graphics Card:
1x NVIDIA GeForce GTX 280

Other PC Specifications:
Speakers: Headset - Sennheiser PC 350

Case: HAF 932


What should i upgrade? I been thinking on a new soundcard but it need a extra PCI express slot (my MB only got 1) so i thinked on Auzen X-Fi HomeTheater HD and an new motherboard...

 

[obsidian86]

get a cpu cooler and clock that sucka

and grab an ati 5850 or gtx 470

i would suggest the 5850

 

[darkzombie]

I already got a cpu cooler, even so i don't know if it's anything worth..

How much should it be clocked if so?

-

Whats the real thing ATI - NVIDIA? I be talking with two mates, one mean that NVDIA is best for video when ATI is best for images.