It wasn't until later that I discovered another comic shop less than a block away from Jugger Nauts. Thompson Productions LLC has a lot of manga series (which I'm not so much into, but I'm trying) and seems to be geared to an older crowd. They recently opened a kiosk store in the Whiteman Air Force Base shopping center to cater to the young airmen.
Of course, the big-box stores like Hastings, Barnes and Noble, and Borders also carry comics and graphic novels, but I liked being able to walk into the local comic shop and have the owner recognize me and pull something from behind the counter that he set aside knowing I would be interested.
To get an idea of what graphic novels would be good for students there are lots of places to look. Some of my favorite starting points are:
Sidekick's Graphic Novels review
Diamond Comics web site
Good Comics for Kids via School Library Journal