We go to a local Christmas tree farm and get the biggest tree we can find, usually 9-10 feet. I can barely get it in the patio door. Oddly, the big trees are the cheapest ($16) because they are in very low demand. Luckily, the ceiling in the living room is about 20 feet.
We had a high ceiling in the house in Oklahoma (constant battle with the spiders :-), and had quite a large tree one year. The cat knocked it over more than once.