I will be getting money to spend soon, roughly $500, and I was thinking about either getting a nice 5.1 sound system for my room or upgrading to a 6800GT. I am leaning towards the 6800GT because I want my PC to be able to play some of these new Doom 3 engine games (RTCW 2 and Quake 4) and I want to turn the settings up and still get smooth framerate. Plus, I can sell my X800 for about $200-$250 and get part of my money back. However, one of those 5.1 systems truly sounds appealing. What would you do?