dostanio :
aardwolf would you reckon its well worth buying a 3870x2? I am considering it, or an 8800gts 512
Personally, yes, I am extremely happy with the performance I am getting out of the card. I would recommend against the GTS if that's the comparison.
3870x2 vs 8800gt : 8800gt wins on the price/performance curve
3870x2 vs 8800gts: 3870x2 wins on better performance (most games), and better price/performance
3870x2 vs 8800ultra: 3870x2 edges out 8800ultra on many games... I don't believe this is up to "most games", but with later drivers it should be.
3870x2 vs 9800: I believe this will go to the 9800, but time will tell.
rgeist554 asks the most leading questions, though. If you're gaming at 1024x768, probably 1280 (and want to keep gaming at that resolution), then go for the GTS. If you want to go for the higher resolutions, especially over 2000 pixels wide, I'd go for the 3870x2. (I'm running at 1600x1200 now... have to put off the monitor upgrade for a few months).