I like the colors, but the blending is weak and the render feels to small on the canvas.

I think the depth could be enhanced by better lighting in the bg

The background is amazing, I want to be able to smudge like that

i think the thread with all the PSD's for sane's smudging are still in one of these threads, if you pm him or if kill has a link to them still, just go in and read/practice through.