With all due respect to Long Island and the Finger Lakes, the most exciting wines on my tasting table over the past month or so have been from the Niagara region of New York.  Generally speaking, they are well-made wines that are well priced and show the kind of distinctiveness I look for. This Arrowhead Spring Vineyards 2010 Syrah ($35) is on the higher end of the pricing scale, but it delivers today and has the stuffing to improve in the bottle over the next five to ten years. The intense, layered nose shows dark, brooding fruit — blueberry, blackberry…