What I'm wondering is, will I be able to run this on high/max settings with the 1440x900 montior? I'm not looking to upgrade it until it dies/breaks on me. Or should I look at getting something more like a GTX 560 or GTX 580 for the fps and better image quality? I'm also not looking into Raedon. I've used them in the past and much more prefer nVidia cards.
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Not max settings, probably at least high at that resolution. I would tell you to get a 560 but they are just so overpriced.
Judging from the beta benchmarks on Techspot, you should be fine. Maybe not Ultra with AA, but you should be able to find a nice equilibrium somewhere at high/ultra quality.