Wachau Valley wineries

I cannot give you a recommendation for a winery, but this restaurant is said to be the best for fish in the Wachau area:
https://www.heinzle.at/

Lois these 3 wineries are excellent

https://www.weingut-jaeger.at/en/home/the-winery/

https://www.weingut-hermenegild-mang.at/weingut/

https://www.gattinger-wachau.at/de/

There are few things in life as pleasant as having a glass of wine and a plate of cold cuts at Mang - https://www.weingut-hermenegild-mang.at/

Hofmeisterei Hirtzberger is also fantastic - https://www.hofmeisterei.com/

There are also several great heurigen/wineries in the village next door of Joching, such as Josef Jamek.

The Fallstaff website is the top source for food and wine ratings in Austria. This link lists Wachau wineries by star rating. It is in German, but you can easily google translate - https://www.falstaff.com/at/weinbaugebiete/wachau-oesterreich-1

Thank you all for the helpful responses. They were just what I was looking to know. I'll raise a glass to you when we are there! Lois