Norm is the first person that I have ever seen call an old Saab reliable, and I like Saabs.... :) If they still were around to make wagons, I would probably buy one today.
I'm not sure what price range you are looking at, but if she liked her VW, a newer VW Sportwagon would fit the bill, and you can find used diesel versions which are known to run forever with proper maintenance. I had a 2013 diesel Sportwagen which VW bought back, but it was a very comfortable car, had no issues and got fantastic mileage. Newer VW's are much more reliable than they were 10-15 years ago.
Acura made a TSX Wagon for a few years up until 2014. These are extremely reliable and have very good space inside. You can find low mileage versions. Acura TSX's are know for being able to drive well north of 200,000 miles with very low running costs. The naturally aspirated inline 4 in the wagons makes good sounds and will run forever.
There are some other used European wagon options from Volvo, Saab, BMW, Audi etc... that are nice, but will not get great gas mileage and will have high running costs as you get into higher mileage.
The Subaru's are nice, but with the horizontal boxer engine configurtion the gaskets are oriented vertically which tends to cause their leaking and oil consumption issues over time. Supposedly this has been dealt with in newer Subaru's..... but time will tell.