I was able to put the dimensions of the new couch which is significantly deeper and a little bit longer into the room planner which gave me a good idea of fit. We have quite a bit of open floor space so getting a deeper couch will just move everything else forward a bit.
We are considering building a wall of bookshelves on the far left wall that will wrap around to the parallel wall so I added the assumed dimensions to see what affect they would have on the overall feel of the space. This is a very rough plan but it allows me to see how everything will work together. What do you think?