I'm just happy to see another office tank with IOS. Very soon, you will find that you are spending more time in the office than anywhere else!
How are you planning for your return output? If you don't mind pipes, you can split it in 2 and run one on the inner top right hand corner and the other to the front top left corner, both with Hydor Flo deflectors. That should help reduce the flow rate, yet give you random flow.