My father will be celebrating his 80th birthday in the spring and my husband and I would like to treat my parents to dinner at a very nice restaurant in Phildelphia. We're looking for something that would be a truly memorable experience for them, that is definitely celebratory, with fine dining and excellent service. Le Bec Fin would have fit the bill perfectly, as they have lived in the Philadelphia area for many years and are very familiar with it as a one of "the" places for fine dining. I'm looking for suggestions that would be along similar lines...so nothing too trendy or loud. We understand that this won't be a "cheap date" :) and are happy to spend what we need. Thank you!