Peller Estates Restaurant?
DH and I went for dinner in January. We both had the seven course tasting menu, and while I can't remember specifics at this point, every course was delightful. Even ingredients that DH doesn't usually like (artichokes, oysters,) were done in such a way that they won him over. We went during the ice wine festival, so the wine pairings were heavy on the sweet stuff, but the regular wines that we had were all well-matched to their respective dishes and were better than we had expected.
We'll happily go back the next time we're in NOTL. The room is a bit stuffy and old-fashioned, but they have floor-to-ceiling french doors running the length of the room that open onto their patio overlooking the vineyard, which I would imagine would be a spectacular setting now that everything will be nice and green.
We haven't tried any of the other vineyard restos, so I can't offer any comparisons, but I don't think you'd be disappointed at Peller.