Here is the final version.
The DVD/CD cabinet is now in the basement housing my boys' video games (still in their original plastic containers -- I can't even go there yet). I also removed the big candle lanterns on each side of the mantle because I wasn't feeling it; it was too much. I moved the lamp to the right because that's a dark corner, and while I would love to have identical lamps, I'm not going to buy another one, mostly because I got this lamp many years ago and they probably don't make it anymore. I won't buy matching lamps because that would be the opposite of what I'm trying to do. The square candle lantern on the left is about the same size and satisfies my need for symmetry, so I'll keep it like this.
I know many of the home decor magazines turn their interior design noses up at symmetry, but I NEED it. I think it may have something to do with being a Pisces, or maybe not. Either way, I don't feel the need to be trendy when it comes to my home decor, and I think it's important to do what makes you happy. And this makes me happy.
Finally, were twinkle lights always called "fairy" lights? And if so, how could I not know that?!?!