King's Discus is in the International district at 805 S. King St. It's a pretty quirky little place--but, the owner is friendly and he has some cool fish on display. I've been down there when he's just been loaded with Discus and Angels. Right now he doesn't have as much.
I went down there again today and looked at the Peruvian Angels. Based on the input that they may be a little more aggressive, and may get a little bigger than the average Angel... I'm going to wait to try fish like that until I put up another, larger tank.