I would think it would look better to have some more rock. You could also add some more flow in that tank. You also want to consider what kind of corals you want in your tank and where you want them. I this hobby it is very important to plan ahead. As for your heat issues, you could build a small LED fixture for like $90 from RapidLED.com. All you need to know is how to solder. The LEDs would allow you to keep any coral, they run cooler, and use less energy.
Just ask if you need some advice on LEDs.
Just ask if you need some advice on LEDs.

