Recommend me a Graphics Card

[Vanquish]

Your CPU will probably also be a major factor when using recording software (for me it's THE major factor, which is why I OC'd a bit). I never tried recording much with my rig but I was able to record Skyrim on ultra (with a lot of HD mods) at a completely fluent 60 fps, so it's a safe bet that AC would be fine. A 600w PSU is enough to support all but the most high-end graphics cards - if money really isn't an object as you stated in the OP, you could even try a 280x, but that's the point where a lack of CPU power would start to become a problem.