I'd recommend slicing out the soundcard, onboard sound may not be perfect, but it works just fine for me. You can always easily add on a soundcard later if you desire, but in all honesty, memory and video output are a whole lot more demanding than sound, so it's better to invest more in the things that are crucial to a good, clean performing system.
Drop the soundcard, and you should be able to get a 9800 Pro without sacrificing any other components methinks.