Anyway that card seems quite excessive to me.
I am saying that because the 4GB of memory is a waste. Most games hardly use 1GB.
The cores are still 5870 cores, the only reason it is clocked at 850mhz/1200mhz is because it has a better cooler.
I have the 5970 w/ waterblock. Idles at 30C and loads at 40C, which means I do have it at 950mhz/1200mhz. Waterblock is $120 price premium.
That card on the other hand doesn't seem like it only has a $120 price premium. The people on that forum is called out $1000. Woah that crazy for an extra 2GB of memory.