by Dale Williams » Mon Aug 27, 2007 12:45 pm
(edited to add Ian beat me to it!)
Tasting Barbera will tell you about Barbera, but not about Nebbiolo. I don't find them that close.
Best option is probably your first idea. Taste a non-Barolo/Barbaresco Nebbiolo from a few years ago. If you can find it (common here, unsure re UK) try the Produttori del Barbaresco (the excellent co-op from Barbaresco) Langhe Nebbiolo. Usually a great deal, about $12-15 US (and their Barbarescos are well-priced, too, usually $20-25 for the base) . For a bit more money, Bruno Giacosa's Nebbiolo d'Alba is even better - but it benefits from some bottle age.
If not, another Nebbiolo di Langhe, or Ghemme, Gattinara, Nebbiolo d'Alba, or Colline Novarisi. I'd stay away from supermarket brands- producer, producer, producer.
Last option is to find an aged Barolo or Barbaresco from a good but not acclaimed vintage, such as '93 (or '95, though those are iffier).
All that being said, it's just a fact (IMHO) that the greatness of Nebbiolo is most truly apparent in mature bottles of Barolo or Barbaresco from good producers (which unfortunately are really skyrocketing in price, out of my reach). I drink and enjoy Langhe, Bourgogne, and Cotes de Castillon, but never can pretend that I am equaling Giacosa Barbaresco, Rousseau Chambertin, or Petrus.