Not sure about a soundbar recommendation, but I use the same room for HT and 2 channel. The systems are separate, but in the same room.
Yes, my wife and kids bust my chops about running a speaker showroom, but I like all 9 speakers. Full 5.1 HT (on wall), and separate 2 channel with sub for music.
On the main floor we use an older Definitive Technologies 3 channel soundbar in a 3.1 setup. I like it fine for TV. For movies it's not quite there, but any movie watching done on the main floor is casual and it's OK for that.
Are you looking for a passive soundbar, or a powered one?