mark levin-
There are so many different models available that it’s difficult to recommend one specific unit. Even online reviews tend to be skimpy because of the great variety available.
The best thing to do is measure your room’s width, length and height (yes, I saw you already have a BTU preference), then speak to a knowledgeable and honest salesperson.
Our experiences with Duddy’s in Boro Park have been good and I’d recommend them if you’re from Brooklyn or nearby.
I don’t know where you live and I’m sure others have recommendations too.