Personally I just can't have the computer monitor where phantom center is, it just messes me up... having a console in front of me is hard enough.
My room sounds best when I remove everything but the speakers and playback amps but I could never work that way. Like that, I can sit in the 2/3rd's position in the room and enjoy the sound. However, I've had a desk in front of me for 34 years and need it there to do my work. I got use to working this way as such I still sit in the 1/3rd position in the room. It works... for me.
Open back on the low profile console (always), low boy slant racks to each side, space in between the low boy racks and the console, console top slanted for proper refection, eliminate all (or as many) early reflections as possible, high ceiling doesn't hurt either... go...
I have been toying with going the Captain Kirk / bridge of the Star-ship Enterprise route. One chair in the middle flanked by two low boy racks to each side and then a chair to each side of those for the client(s). Trying to make the sweet spot big enough for all three... Next time I clear the room out to have the floors redone (very soon) I might try this and see how I like it.