I don't think Nagoya has any really great hotels. That Marriott would probably be quite acceptable but by no means luxury.

The best and easiest way to get to the Marriott is to take a lift or escalator from Nagoya station. It's right on top of the station.

There is a branch of a well-known miso tonkatsu place in the shopping center adjacent to the station. I forget the name -- someone here will know, I hope!