I really like most. It all goes together well and if you customized that background, great job because the lighting is perfect and it all goes together well. Definitely a very cool background.
The 2 things I have a problems with, are your stock and text. Your stock is too hidden and looks faded or something, give it a bit more attention, maybe manipulate the color of his outer shirt or brighten his clothes up a bit, maybe even add a bit of a glow or something. I would also move him more to the right, although your background is cool, it is a bit blank to the right. If there is one thing really hard to make look good in a picture, it is the stock itself and blending it in just enough, while having it stand out too.
Also, the text in the bottom right is very boring. The glow is the only thing that works for it. The text style is boring, either make your own text for it or find a really cool text font that goes with the picture better. Also, I don't like the foreground color (the black in The King), it is too dark for the picture. Either fix the text or remove it because I'm diggin the MUSIC text.