The one that's in the picture already looks great. If your thinking of adding another I wouldn't. If you have to replace it then I would go with the lighter one.

I assume that photo isn't your current room. I agree with the 1st sofa option with more clean lines.

This is not your room?

I wouldn't change anything as your living room sofa looks great. but if you do decide to change, i'd go with the dark chocolate brown for contrast.

I like the darker one and it will be less likely to show marks.

What a great job you have already done! I would suggest the darker sofa for a few reasons. The contrast and clean lines would work well in this space. The base is unique and doesn't repeat the leg style as the other sofa would. My only concern is that the end table and coffee table are dark brown as well. Any chance you can change out the coffee table too? Maybe something with a lighter stone top to bring another finishing element? Best wishes and have fun!

I also like the one in the photo; 2nd choice the darker one.