For me, year in, year out, it has narrowed down to but a few.
Taylor-Fladgate 20 Year Tawny
Porto Baros 20 Year Tawny
Fonseca 20 Year Tawny.
However, that is just me, and what do I know?
PS - the Taylor 20 usually beats out their 30, and their 40.
PPS - Never have tried, nor even seen the Dalva, but will look for it.
Some new ones to try here. I've loved the Ramos-Pinto, Rozes, Poças and Barros. Had the 20-year and 40-year (oh wow) Dow. Magic flavors of dried fruit, fig, caramel and nuts develop when tawny is aged 20 years, and you don't get them before 20 years. I can almost taste them now. Thanks for the post. Time to go shopping.
re: maria lorraine
Me too. I love Ferreira's Duque de Bragança. Since 20 year old is the oldest designation for this house, the older components for blending find their way into this bottling, rather than saving them for say a 30-year-old. I really like the complexity contributed by the older wines and the fresher fruit signature of the balancing younger elements. I also find it a little bit drier in the impression of the finish than some other houses.