I'm in the same situation. I live in a rented apartment with neighbors all around. I'd avoid a down-firing floorstander. You might be better off with front-firing standmounted speakers decoupled from the floor. If the room and the speaker allows, move them a little away from rear and side walls. With the right speakers you could have very good sound at moderate to low volumes. When you're listening you don't want to have to be concerned about whether you're disturbing your neighbors.
