It wont fall to 13k for atleast 6 months. Maybe 15-16 by the end of the year and q1 next year.
Nvidia cards are gonna cost more than that and availability will be an issue.
To make the most of your resolution and be future proof get a 5850. It should play everything at max eyecandy at your resolution for a year. After that heavy dx11 titles "might" be a bother.
Be patient dont buy anything till december and get a 5850 for around 16k then. Drivers should have also matured more and Dirt 2 will release around then one of the first DX11 games.
Your psu will suffice for a 5850. It should even run the 5870.
Nvidia cards are gonna cost more than that and availability will be an issue.
To make the most of your resolution and be future proof get a 5850. It should play everything at max eyecandy at your resolution for a year. After that heavy dx11 titles "might" be a bother.
Be patient dont buy anything till december and get a 5850 for around 16k then. Drivers should have also matured more and Dirt 2 will release around then one of the first DX11 games.
Your psu will suffice for a 5850. It should even run the 5870.