Do you want to try any artworks before you decide?
Having studied Interior Design for 4 years before becoming a full-time artist I know how important it is to get an idea of the scale and colour of artwork in your room.
Just get in touch with what painting/format you are thinking about, I will simulate it for you.
All I need is a photograph and a measurement of something in the room, but I can explain better over email or phone. It's very straightforward and lets you see the artwork in your setting.