Wolffer Estate, one of two quality-focused producers in the Hamptons, focuses mainly on two varieties: Merlot and Chardonnay. They make no fewer than four different bottlings of each — including Long Island’s most expensive wine the Premier Cru Merlot, which retails for $125 and a succulent, lively late harvest chardonnay. Some of those wines are good for everyday drinking. Some are stunningly delicious and complex. But still, who can live on only merlot and chardonnay? I know that I can’t and, as you probably know, I’m a big fan of Long Island cabernet franc. Wolffer’s winemaker, Roman Roth, makes a…