Well under normal circumstances I'd say yes because the 8800 320MB is a damn good card and
at $250 (after rebate) the card is a steal, especially if you can get $100 for your 7800.However:
a) You are satisfied with the current performances.
b) You have a 360, which takes care of titles like Gears of War, Fallout 3 if you don't want to play them on the PC.
c) You don't really care for Unreal 3 or Crysis.
d) The Witcher uses a modified version of the NWN1 engine, so it should work alright on a 7800.
e) Quake Wars apparently has the same requirements as Doom 3, which should again work well for you.
f) Fallout 3 will use a modified version of the Oblivion engine -- which you found ran well on your system.
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Here is a larger list of the hot titles with expected release dates. :
Stranglehold 9.05
Medal of Honor: Airborne 9.04
Enemy Territory Quake Wars 10.02
Half-Life 2 Ep2 Team Fortress 2 10.09
Hellgate London 10.30
The Witcher 10.30
Need for Speed: Pro Street 10.30
Gears of War 11.01
Unreal Tournament 3 11.12
Crysis 11.13
Kane & Lynch: Dead Men 11.13
Call of Duty 4 11.05
Alan Wake 12.31
Space Siege 1.1
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Nvidia will come out with the 8700 in late November, and a 9800 a bit after. The 9800 will definitely be at the $550 price point, and something that is targeted at $300 in the 9xxxx series won't hit till at least next year (at least I don't think so).
On the other hand, the only benefit of getting a 8800GTS now would be Bioshock. Who knows what the situation is when The Witcher is released?
I guess the question is, do you want to wait in hopes that the price drop comes, or a better product is available at $300? At the same time even if the card drops by $50 in three month's time, was that $50 worth the three months of wait?
One thing is for sure, for the past few years Nvidia has been releasing new cards around October/November. Even if those new products don't bring about a price drop, I don't think it is a huge loss to wait a bit longer? You've already been more patient than others who went ahead and bought their 8800GTS 320s at launch. Maybe you deserve something better for waiting? How about this?
VR Zone says it is coming Nov12We first told you that G92 is 65nm based with 256-bit memory interface back in June and seems that HKEPC agrees with us now. Lots of confusion on the discussion forums that G92 has 512-bit memory interface and is the highest end GPU from NVIDIA which, in fact is not. HKEPC revealed that G92 will be launched on November 12th and will replace the current GeForce 8800 GTS series. It is meant to compete against the RV670 while the low end G98 will compete against the RV620. However, launch date for G98 has not firmed up yet. G92 supports PCI Express 2.0, 50GT/s texture fill rate, Pure Video Gen 3, HDMI and uses display port. G92 will still be named under GeForce 8 family.
If this turns out to be true, you should definitely wait till Nov.