Now THIS is an acceptable tradeoff for maps... ish. I wish we had more effects, like crespular rays, bloom, bokeh, reflections, and not-ugly water. Oh well, that's for later.
GTX-550i (factory overclocked) @720p:
~25 FPS on max with no bricks (~10 with Afgan DM loaded)
~50 FPS (no bricks), ~25 (Afgan) on Medium
~500 FPS on minimum and ~115 on non-soft max
Medium (25 FPS) is acceptable imo, but any less is pushing it.