Shame...its gonna be hard to place them really well with them there.
I would probably try, given the shape of the room and the presence of the cupboards, getting them the same distance from the wall and the cupboard, sticking some absorbtion on the walls and the cupboard door, bass trapping the corners that dont have cupboards in (which assuming you took the photo from the doorway seems to be one corner!) and hoping that the cuboards actually help trap a bit of low end and reflections.
Youre clearly pushed for space in that little corner, but I'd try and keep the monitors away from the side walls and close to the back wall (in contradiction with much common wisdom I've found that works well in small rooms: the alternative, and best way in bigger rooms is usually to have them well into the room so the speakers are at nodal points in the rooms resonant modes, so they cancel the modes to a degree).
At least the room isnt very symmetrical, so maybe you dont have massive modes to deal with, which is something at least.
And, yeah, its a horrible thing; I was slightly aquanted with one guy that was killed and one that was shot (two of the cabbies). Just knew them to say hi to, been in there taxis quite a few times. Nice guys.