I really like your music -- the background is perfect, but the main melody seems a bit too serious for a game like CorsixTH IMHO. For example, in "Th Funk 1", 1:56-2:13 feels basically perfect, but the added melody in 2:14-2:30 ruins the game-like feel for me.
What do you use for creating the music? Would you mind publishing the source? Also, could you license it under a license that allows modifications (CC-BY-SA, perhaps?), so that people could play with it and refine it down the line?