Updating the Wardrobe

I really need to buy some new T-shirts. As I was looking through my closet this morning, I noticed that almost all of my wearable (meaning there are no holes in it) shirts are anime-based. While I like anime, I'm not quite the anime geek I once was. I'm not really creative enough to make my own custom made t-shirts so I'm asking you guys for advice. Where you do buy cool yet sorta geeky t-shirts?