As the weather takes a chilly turn, we gravitate toward downy sweaters, crackling fireplaces and sumptuous, warming Port. Rich and sweet, these Portuguese fortified wines make an appropriate accompaniment to the festive flavors of the holiday season and are made in a bevy of styles to fit any occasion. Vintage Port takes top honors as far as price, aging potential and prestige are concerned, but tawnies and Late-Bottled Vintage Ports offer delicious, ready-to-drink flavors as well, and lighter-style ruby Ports feature plenty of direct flavors at bargain prices.