I do like your idea of an ottoman instead of a traditional coffee table. Since you have a fairly mod/hip style going, you should find something equal. I do like the one that is tufted all around but of course in some other color for your room. Something low and sleek.

I think you need to stay neutral to ensure that your couch and room colour are cohesive. The odd colour out ... that pops out at me when I first look at your photo's is the silver around the wooden TV cabinet doors. I would suggest long term (if you are keeping that furniture) that you try to incorporate more of that colour into the room to add balance...... but back to the couch. I would go fawn / beige colour and then you can add colour back into the room with cream / dark brown tones in cushions and maybe a casual throw. Alternatively if you repaint the feature wall from brown to a darker shade of grey I would go with a medium grey couch which would also match in with the silver on the TV cabinet and then you could put a lovely textured silver / grey floor run between the couches and move your coffee table to the centre of the room / rug.

I have two dark grey sofas and I am eager to lose them as I can't find anything too complementary for the either! They seemed like a good neutral tone at the time but being dark they have showed up lots of stains (young kids). Your question was cut off but if you wanted to add a rug or furniture, I might suggest an orange/rust tone or even a red? But the colours of your walls will have a big impact... Hope this helps. :)

I have loved our deep leather lounge for the same reasons that many have stated above. You literally "lounge" and when I had a shoulder operation it was the perfect bed for recuperation, giving my shoulder support while, at the same time, giving me a comfortable and easy sleep. However, as I have aged, and also due to my small stature, I am finding that my back begins to ache because the back of the lounge does not support my back firmly enough and my feet don't touch the ground. I am now looking at a smaller, upright and supportive type of lounge. I do have a couple of chairs that fit this but it means that I am not sitting cuddled up to my husband.