I think it depends on the style and atmosphere you want to create in the room. If the room is a formal, traditional one like your picture, then one large showy pendant would look great. However if it is a modern or contemporary room then two ( or more) smaller pendants would be a nice feature. It would also pay to think about how much light you are expecting from the fitting, especially since it is a cathedral ceiling. Do you need the ceiling lights for good general lighting or just for atmosphere. Do you have any photos of your room so we can see a bit more?

I like Organic!

Anyone know where to get these matte black pendant lights from?

My new kitchen will be light grey cabinets, white and grey stone bench tops. My current dining table is a clear glass top, black leather chairs with chrome legs/framing. I love these gold polished glass pendants for over my island bench but will they look okay with my dining suite or is it too different? I can go for the grey glass lights but they are quite opaque during the day.