I like your setup. The PVC provides the perfect place to hid wires for various equipment without detracting from the appearance too much. As for the lights suspended above the tank. I have multiple tanks with defferent setups. I really like having the light suspended above the tank as opposed to resting on the lid. This makes getting into the tank simple and well lit so that you can see what you are doing. It is however a comprimise, the higher you put the light the more out of your way it is, but the less light gets into the tank. On my large tank I have the light suspended 12" above the tank. For the most part this is a good height, but I have to admit that I have bumped my head on the light a couple times. You can always compensate for the extra light loss due to the height by using brighter lights.