This is pretty cool! The foreshortening makes it really dynamic, and it's awesome at a first glance, but a couple of things look kind of weird on closer inspection. His foot looks kind of disconnected, maybe some leg should show sticking down behind it? The only bit of leg showing beneath it looks very level with the rest of the body. Also, his hands seem too small. While it's not incorrect, I think, it looks like he's holding his controller too far to the left, especially since he's facing forward. Maybe if the hands were just brought out father from the body? The shading is really good though, especially on the clothes. That shirt is amazing!
As for scanners, I use an Epson Perfection. I really don't know how it compares in performance or price to other kinds, but it works for me.
Welcome to SA, and I hope that helps! ^.^