From a Wine Country perspective, I second Terra but would also recommend Bouchon, the bistro in Yountville by Thomas Keller (French Laundry) and company. La Toque – as good as it is – will definitely challenge your budget. I've heard great things about the new Pére Jeanty, the latest restaurant by Philippe Jeanty, chef of Domaine Chandon during its heyday. (The menu is also French bistro with an emphasis on southern France.) With the French Laundry temporarily closed for remodeling, the best restaurant in Napa Valley may be Auberge du Soleil, but that might push your budget.