No no JC, this is not my PC room's system; this is only for suggestion of one of the bass traps positioning. ...Just for picture suggestion purpose.
With your speakers I would try first one 'cylinder' bass trap on each inside of your speakers (between the front window and each speaker).
Then on the outside of them; your looking for tightness, trust your ears, by physical experimentation. ...Alternative to measurements, which in my book is as valid if not even more so.
And whatever sounds best (tightness), try adding up more trapping bass material for even further improvement; with that balance between room's aesthetics and sound quality. ...Your own taste (preference).
* My PC sound and video system is much more simple; my near-field monitors are way more smaller, and my pre-main amplifier is much more modest (30 watts per channel).
My screen is slightly larger (27"; thx to Mike), and I don't have any walls in the near vicinity; my design plan is fully open floor type, in the middle of a room. ...I got no reflections at all, just like if I was outside. One of these years I will post a picture ....
And I got no sub, yet. ...And everything is self contained; within my own table (3' by 4').
But my carpet is much nicer, and I got a 360 degree view of my surrounding; visually, and auditory. ...Freedom without restriction. :b