If your specs match the recommended, it should run smoothly, even with AA. If you disable AA, I imagine the image is not going to look "higher quality." Perhaps there will be an optional FXAA setting, which doesn't look quite as nice as 8xMSAA, but usually provides for much higher frame rate.
Hopefully Koroush Ghazi or someone similar will complete a detailed tweak guide illustrating the performance hit from each of the settings.