^^^^
Looking at the pic I assume your setup is placed upon the longest wall ( assuming the room is rectangular shaped). You want to point your speakers towards the farest wall possible. Set the speakerstands away from the wall and and situate the setup before the speakers, leave enough room to get behind the desk. Reason for this is to place your hotspot in a part of the speaker's wave where dynamic pressure is actually fellt by the nearfields. When you're to close to your nearfields you wont feel the speakers but just hear them, same for bass, you wont feel the bass eyeballin a nearfield 2 foot away from the speakers. In an accurately shaped room you can hear the true bass from the nearfields when standing in the corner, this as a reference on how the dynamics responses behave in the current mix.
Get the mpc from the stand, that's blasphemy, whether you dont smoke or dont booze heavily, its one incident you can prevent at hand lol! I personaly get comfy on a deep desk with the mpc tilted slightly in front of the tft, keyboard/mouse before mpc and to my left a controller keyboard ( on an L-shaped desk or on standard/pc furniture like you use now ). Last but not least, get either a set of rackmount rail or a little rack for on the desk and place the I/O -audio rack in there and seperate the powercords from the signalwiring to prevent static, humm, just noise in general.