Spanish restaurant/wine bar
It's hard to beat Casa Mono and Bar Jamon for having the most robust Spanish wine list in the country today. In terms of wines list, they can even go toe-to-toe with some of the regarded restaurants in Spain that I've been in.
A (very, very) distant second in NYC, imho, might be Boqueria, La Solera and La Fonda del Sol.
52 Irving Place, New York, NY 10003
125 E 17th St, New York, NY 10003