Strong, strong technique. Tightly detailed, especially considering the process. Really looks like you did a clean pencil of this before you started working in Photoshop. A completely effective illustration.
I started with a Black Sillouette, and worked my way from there. I love to do pencil but, like you say, its much more economic this way. Actually I didnt touch a pencil in some time now. But should do some Pencil Stuff to not loose the skill .
I respect and enjoy your work. You are one of a very few artists I watch on DA... I'm not a snob... I just know what I like, and what I respect. In any case, your work is very, very good.
Occasionally, a piece strikes me as exceptional, for various reasons. I don't know if you were attracted to the subject when you did this image or not, but your work is outstanding. The piece came out very strong, and I felt it was worthy it to let you know that.