Looks like you have a lot of work to do. I will be watching this thread intently as I am going to start a 125 gallon soon.
It's not work if you enjoy it
I got a good portion of the plumbing dry fitted and some cemented together today. Waiting to finish the cementing of the PVC until my wife is out of the house because of the fumes.
I've been playing with the aquascape and background/above tank ideas. I really don't like the look behind the tank so I want to spruce it up or cover it up some way. Here are some better picks of the wood and stone. The final picture(s) is of me playing with the aquascape.