Check out the Midea cube 50 pint with pump which is currently on sale at Amazon. This is one of the most efficient dehumidifiers per Energy Star testing, and a pump so you don't have to manually empty the tank is nice. The overall design is also rather clever and compact. Note that the federal government recently changed how dehumidifiers are rated to be more realistic, so what we call 50 pint models today used to be called 70 pint models.

The actual core refrigeration loops in dehumidifiers all come from the same factory in China so there shouldn't be significant performance or reliability difference between brands. The efficiency differences are mostly due to what generation of the loop is included, with the most efficient using the newest and most expensive version. This is why when there was that big dehumidifier recall a few years back essentially every brand and model were included.