Thanks guys. I just did a mock up with the TV lower and it looks great. I ordered a pair of the Full Metal Brackets and I should be able to angle the VP150 down towards the listeners. It just looks funny being 8 feet off the floor.
I am aware of the problems having a TV over a fireplace. I am installing a gas fireplace insert with a mantel above it. The mantel will deflect a lot of the heat and I will be able to control the temp the fireplace puts out with the supplied thermostat. So if it gets to hot, I can turn the temp down or off.

I'll post some pics when I'm done installing the rock. 7 feet wide and 15 feet tall, should be fun!

Thanks again