I'd get a decent stand and move the TV next to the fireplace. There's no need to place it up there. Above the fireplace should be the absolute last resort. You have other options. Additionally, if it's not too late, once you move it and put it at the appropriate viewing height, you'll want a larger TV. Unless you're only sitting 5 feet or so away, 40" is probably too small.
Are those Bose speakers?
Are those Bose speakers?