lol, you are always coming up with some crazy questions. the gtx460 768 is about 20% faster than a gtx260. in some games you would want more than 768mb of vram but the ones you listed are fine. plus even the gtx260 can tear through those games.
you seem to be acting like gddr5 is about the only difference here. these gpus have completely different specs though. at the gtx460 launch, gtx285 was about 10% faster overall than a gtx460 768mb but will use more power and be louder and hotter. and with newer drivers and in newer games the gtx460 768mb has probably caught up to the gtx285.So the GTX460 768 mb can be vram limited in some situations? well, the GTX285 is another option. 1gb seems to beat both 896mb and 768mb, unless gddr5 is magically better.
The GTX 460 is definitely more future proof for the games you play and has a lot more going for it, despite the smaller frame buffer size.
I've heard too many stories of people being VRAM limited in resolutions like mine.you seem to be acting like gddr5 is about the only difference here.