the layout is dependent on speaker placement too, what you are looking for when treating a room is where the reflections of the waves will take place, which is dependent on seating position and speaker position. The seating position wants to be an equilateral triangle point from one monitor(speaker) to the other, to the seat. Monitors want to be at ear height. Glass will reflect higher frequency waves right back at you and if you can avoid that then do. Sound treatment can be achieved using absorption and diffusion of the waves. Effective absorption can be achieved with a rectangular pine frame, filled with old towels and covered in an acoustically transparent cloth of any color you choose. They can be more effective than the acoustic tiles. They should be placed on the walls at the point where by holding a mirror on the wall and from the seating position when you see the speaker in the mirror, thats where the panel goes(the reflection point). Its the same for recording mic placement, you want the mic placed where the reflections are absorbed by the panels. The other part of sound treatment is diffusion, which usually goes on the ceiling. Diffusion basically reflects the wave back but the timing of the reflection is "diffused" by being reflected in different directions at different times due to the shape of the diffusers.
Acoustic Diffusion Wiki
Finally you want to deal with the bass traps in the corners of the room
I would go with the one where the window is behind the computer(version 1) and the monitors I would place either side of the window.
I would treat the back wall for reflections, and the wall at the bottom of the picture id place an absorption panel, and the corners with bass traps. I would do that then see if I needed diffusion
You are on the right track, the window would be hard to treat and reflects like a motherfucker.
I angled the window between recording booth and engineering room to try and tackle the problem at our studio.
There isnt much else you can do with glass.
That is a small room though, Id wonder if bass waves even have room to fully form in such a small space. Maybe the room is bigger than it looks, thats a big old bed in there
