Fine Dining In San Jose
If you need to be in downtown San Jose I'd suggest 71 St Peter, I take all of my out of town coworkers there. AP Stumps is decent. Arcadia is nice looking and expensive but the food quality and service can be spotty.
Seven is a bit outside downtown proper but has nice food. However, if you don't mind driving a bit, go to Manresa in Los Gatos, it is only about 15 minutes drive and is an experience.