I think you might want to consider a Glock 26 in your comparison to the 9c, as the 9c appears to be in between the 19 and the 26 in size. I've got a Glock 27 with a 9mm conversion barrel, and I'm running it with a Glock 19 mag with an X-Grip sleeve, so the grip feels similar to the 19, but I've got the ability to run the shorter G26 mags in it if I need concealment.
Having said that, the 9c feels great in the hand - better than the Glock - to me. I don't own one, but would like to spend some range time with one. I do like the fact that it's available with an ambidextrous external safety. It also has a huge aftermarket (like the Glock) and S&W's customer service is legendary (better than Glock's).