How have people been running Battlefield 3 on their rMBPs? I am running it under the developer preview of Windows 8 and I can't seem to get the settings right to get the combination of very crisp graphics and a great frame rate. In general I am running medium settings and 1920x1200. I would really like to run 2880x1800, but that may be a tad optimistic. Has anyone found the perfect settings?