I always always ALWAYS go to borders for my manga-addiction needs!! Manga is the name of the genre of japanese graphic storytelling and I'm hooked. They have a whole two huge shelves for it, I love them!! They have a relatively lower demand than Barnes and Nobles, particularly because of their location, but that just means that they're in stock more often! B&N is always out of stock and it bugs the heck out of me.
Borders also has a nice relaxing environment for the caffe. On some nights, they even have live performances -- and it's just too wonderful to sit their sipping coffee, reading your favorite book, and listening to the lulling sounds of an acoustic guitar. I get all fuzzy inside just thinking about it!!
Borders also offers coupons for online members!! I can't remember whether it's just for the mailing list members or whether you need to pay a fee for this membership, but I know my brother always gave me free coupons through his membership *shrugs*. ANYWAY....cool beans.