With the false scale drawings, I am not even sure anyone can give advice here. Both rooms are almost square in dimensions, if these are even correct. If the measurements are in meters, then you may really have something. lo!
As to the driver size question, you need to give way more info than, 'hey, here is my inaccurate measurement of my room, completely starved of any real information, without regard to what type of music I plan to produce, or record, and while I am at it, I don't even care to take a bit more time to make a decent drawing, after I obviously made a haphazard one earlier.'
You may as well ask 'which USB mic will make you sound pro' at this point, because you are being completely vague.
Detailed information of your space, it's construction as it is now, as well as details on what it is you plan to achieve, would be a good start to get close to good advice.
You have been around here for a while. Where have you been lately?
I just realized that I sounded like a dick there. I forgot to add a smiley.
![Big Grin :D :D](/images/smilies/biggrin.gif)