Questions on window between tracking room and control room

Hi all, I am pondering about a window between control room and tracking room, and wonder if there's an easier way out (never eh?) than building my own window, and their drawbacks: 1. PVC/vinyl window from local hardware store with 2 ply of glasses 2. PVC/vinyl window from local hardware store with 1 ply (or 2) of glass and later adding a layer of plexiglass angled a few degree (up or down) on the control room side. Some how use foam/silicon to fixate it on the existing window frame. I read about the need of lamination, angling, thickness and buffering - but I'm looking for an easier way. I wonder if anybody have success (or failure) in using premade PVC windows for such purpose. Two things that I worry about are: - vibration/resonance - sound proofing ability Obviously the workdesk will be facing the window and the monitors location will hopefully be beside the left and right of the window. Any suggestion? Ernest