I have mine built in to a wall as well. There are a few pics in my gallery. Another thing that would be nice is access from the front wall of the tank, mainly just to be able to watch the fish when they eat. Kinda hard when the tank back is black and the water is circulating too much to see down from the top.
I went with www.Lifereef.com
for the same thing you mentioned. I only wanted to buy once and the system I bought is flexible and is ready to add a refugium and other items. Pricey but the workmanship is awesome and so is the service. Well worth the wait.