sub box

I want to put a sub box behind the seat of my 06 crew cab f250. I was wondering if anyone had dimensions of what will fit behind the seat I.e. 4 1/4" top depth. Also I don't have the sliding rear window but also I have that storage container or whatever it is back there. Any and all comments...

As you can see in my pic below, my newly acquired truck is looking a little sad between my two captains seats. I need a console or custom console that will look good with my interior. Anyone help me out? I am in Afghanistan right now and will be back next month so it may be a short delay in...