Really nice! As Rob said, the concrete texture is great as are the bevelled pillars and the floor texture. I don't think that the dark brown objects 'fit' so well with the rest of the picture though, they look really dirty whereas the rest of the image is really clean. I think this is a real danger of using other artwork and putting it into your own, quite often the feel of it is quite different and it stands out. Is there a way you can put those objects through a photoshop process and make them grey instead of brown? That might help.