yea, i just suggested it to give you another option.
in reality, there is also a 5830, which is the 5xxx series card that fills the gap between a 5770 and 5850, but i personally won't be recommending it yet. maybe when it comes down in price, but right now, for $250 you get a card that's slower than a last gen 4890 and as you can see from my link, a 4890 can be had for $50 less.
so IMO, you should get a 5770 or spend more on a 5850.