Michael, it appears that we have similar floor plans for our control rooms.... except that your room is larger. I had the exact same idea that you had as well as the same idea John had about the bass traps in the corners. Looks like I won't be able to do either now!
I understand about the resonators not being good for the back wall. my side walls don't allow for such treatment either because of one side having a window to the live room (which noone has still yalked me out of

) and the other side has kind of a soffit for my computer screen and keyboard. The rear angled wall on the left side will have the entry door and the rear angled wall on the right side will be my only storage for the entire studio via a 24" closet door. Also, if you look at John's drawing , to the right of the couch in the corner, that is where my electrical panel is. So that works out very well in terms of the new layout.
Maybe I can build the bench at the rear as I planned but fill it with some 703!? I can make the bench a little higher than most to accommodate more bass trapping.
All the very hard parts are done. Now I can move on to the details like these. The hardest part for me was that I had to build the walls in the driveway and carry them myself into the garage and negotiate my way around table saws and such. Then the real pain was when I had to remove the garage door myself, build a jig to hold it up and then cut it to fit snugly into the opening. I then had to put it in place build a jig to hold it there and then seal it up.
It sucks not knowing anyone out here.
Oh well.... it'll be done soon and I'll be able to relaxand enjoy the new place!