When you think masculine and sophisticated you think dark colours. But this is where you have to be careful. You do not want to make your bedroom too dark as you still want it to be warm and inviting. This is why a feature wall is great. It shows that you have put thought into the room without making it too overwhelming or dark. By having all the other walls in a lighter coloured paint it allows the feature wall to stand out and bring that masculinity to the room.
If you keep the surrounding walls light and add touches of warm wood into the room throughout the furniture it will lift the room up well still keeping the sophisticated look you want. You can then go for a middle ground with the bedspread by adding element of the darker colour in the feature wallpaper along with elements of lighter colours coming from the furniture. This will bring the room altogether to create a sophisticated cool, masculine bedroom.