HotHardware has managed to pull themselves away from gaming on the XFX GeForce 8800 GTS 320MB long enough to write a review.  Their findings agree with other reviews you may have seen, this is a great performing DX10 card at a good price.  The only real impact the RAM has is if you have a 30″ widescreen display and crank the resolution up to 1920×1200 and 2560×1600, and frankly if you bought the widescreen, you probably want the full 8800 GTX anyways.
‘XFX’s GeForce 8800 GTS 320MB XXX Edition sports higher GPU and memory frequencies, which will give it a marked advantage over “stock” models. In addition, we’re also going to be showcasing XFX’s flagship GeForce 8 series card here today, the GeForce 8800 GTX XXX Edition. Like the 320MB model, the GTX XXX is clocked much higher than stock. In fact, the XFX GeForce 8800 GTX XXX Edition is the highest clocked air-cooled GTX currently on the market.’

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