I ran ultra for a while with a core 2 duo E8400 3.0 GHz, 2 GB RAM and an NVIDIA Geforce 9800 GTX+ at about 30 FPS in dala/50 FPS in the wild/20 FPS in 25 mans, but the shadows annoyed me so I turned them off, and got 20 FPS more from the tradeoff.
This system mentioned above (~ 4 years old) should be enough to run WoW smoothly IF
- you don't want to run it in windowed mode
- you want to run it on a rather small resolution (1280x1024, 1440x900)
You should specify the parameters before we throw more 800$ rigs at you.
What's the problem with that? Unless it start affecting your work/play i wouldn't bother with that.