In a word, WOW! Very impressive. I even like the softly textured surface they're sitting on. My only suggestion would be to place a couple fairly low intensity lights with a gel to simulate the refraction of your source light through the lenses -- fake the caustics. The image above uses the gel (inset) on a spotlight placed just above the shadow of the lens. I think caustics like this would pop the realism even more. This could pass for a photo.