I'm not a pro so can't provide much help. But those neutral couches will give you lots of options. Are the walls gray?

I'm confused I don't see a mantle that has any décor. The first picture with the blue rug has 2 photographs and a clock.

bwood, the mantel looks pretty high. Just wondering if it could be lowered a little...? I would remove the items on it and find a piece of art that's about 3/4 the size of the firebox opening. Mantels are really much better when simple. I also wouldn't keep much on the hearth...maybe just fp tools, if you use them. The frame to the right of the sofa is hung too high. The center of it should be about 60" from the floor.

Looks like a nice room. Love the windows!

I think it looks great the way it is. I'd get some really awesome throw pillows and a rug to add some color and texture. And just because I'm an art fanatic, some more art for the walls.

Yes, please lower the mantel, take everything off it (sorry, the letters just don't do it and have gone out of style), get a gorgeous painting for the mantel and a large and beautiful rug. For a transitional room I like tribal Oriental rugs (esalerugs is a good vendor), and the ones in polypropylene are inexpensive and sturdy. I would put the lamp with the table near the fireplace right next to the couch and please hang that painting on the right lower.

For what it's worth your room is much nicer than the original, which is full of decorating mistakes and doesn't look beautiful or comfortable. You can do much better!

I would try turning the sofa on the left to make an L shape. You will be able to see tv and fireplace much better (that's if it's possible) cant tell from pics. Then turn the coffee table. You will need a rug to anchor things.