Upper-middle-class homemaker Irene Risser expressed fear Monday that there exists a gourmet coffee superior to the brands she currently buys. 'I have Kona Coffee's peaberry flavor, which is really terrific, and I also like to buy Sumatran Rainforest,' Risser said. 'But I still worry that somewhere out there, someone has better, more expensive coffee than I do.' Risser then went on the Internet to search for $25-a-pound breakfast blends. 