This is really a gorgeous image. The composition is symmetrical, but the lighting angle offsets that nicely and I think it works really well. I'm on a laptop LCD so the brightness is a bit variable depending on viewing angle. If I am looking from slightly above I can see the bench very well, but straight-on to the LCD (what I assume is the proper viewing angle) it's pretty dark.
Is this the original resolution you rendered at? 25 hours? Even with the high AA it still looks a bit sharp - did you sharpen it, or resize at all? If this is the native resolution, what system did it take 25 hours on? That seems a bit high, although the render settings are high too of course... Regardless, a very nice image.
- Oshyan