So all 13 cards in this test group are 3 or 4 generations ahead of mine, and the worst of them can not play 1600X1200 at 40+ FPS (with 4XAA).
I was considering buying the July "best card for $105" Radeon HD 4850 512 MB, but that was not even on that chart. If I bought this, I do not know if the rest of my system would keep up? And even if I did, I can't play at the settings I wanted to.
So up to a $230 GTX460 1GB (only $30 more than the 768MB)? Then I am fairly certain my CPU or PCIeX16 1.0 would bottleneck this card? Thoughts? Whole new computer?
a GTX 460 768mb will be more than enough power for that game
your 1.0 slot is not going to cause any major FPS loss as its basically running @ 8x speed. If anything you can upgrade your board later down the road for cheap and not have to worry about the PCI-E limitation.
Remember this is a RTS so unless you plan on being a hardcore player online you could go with the cheaper card 4580 and probably be ok with frame rates dipping every once in awhile. Honestly your best bet is to have the money ready to buy a card but first buy the game and play a couple of levels or even online only and see how your current card holds up. Then you can look at the charts and decide what type of performance you want out of the game vs how much you have to spend.