Need a better cooling solution for my GPU

[nfayad]

Those are my specs:

AMD Athlon 64 3400+|Asus K8V-SE Deluxe|1Gb Corsair DDR400 PC3200|x800 Pro 256Mb|Audigy 2 ZS Gamer|2x74Gb WD Raptor 10k RPM in Raid 0


Case : http://www.overclockercafe.com/Reviews/cases/RaidMax_Cobra

I am a student and am living in a small 1-bedroom apartment. I am in L.A., California and it can get EXTREMELY hot here so I am having problems keeping my GPU temperature at decent levels. When I am running games such as UT2K4 or Doom3, the GPU temperature (that I check in Overdrive in the ATI control panel) can go up to 70 degrees (!!). When that happens I get some artifacts in the games. The only thing I can do is turn my A/C unit and lower the ambient temperature as much as possible. But then I risk freezing to death >_>

Anyway, I am a complete n00b when it comes to modding cases, and adding cooling solutions so this is where I need some advice. I've done some research and found out I had two options:
-use water-cooling
-use a VGA silencer ( is this a good one? http://www.atruereview.com/zalman/index.php)


As for the case, I know it's not great but I really don't feel like changing it right now.

So what do you suggest I do, and what would be easier for me to install? And is there any cooling solution designed SPECIFICALLY for the X800 Pro? (it's a Sapphire btw)

Thanks for any help you can provide

 

[SFI]

get the arctic cooling silencer

 

[nfayad]

http://www.newegg.com/app/ViewProductDesc.asp?description=35-186-116&depa=0

How about this one? I heard it's the best for the X800 series. And how easy is it to install a VGA silencer? Will I need thermal paste in addition to this? I'd really appreciate it if you could list for me a complete list of what I'd need to install the silencer. Thanks again!