Nice site...good advice and designs over all. Your theory of cabinet placement isn't exactly right. Your far tops should be the top cabinets...not short throw... maybe a crowd blaster would be center of the stage pointing straight down on the listening field to cover center stage, close stage proximity. If you place the short throw and far tops as you have specified, the high frequency and mid range would collide and cancel one another out. Placing the far top on the very top of your array will not cause phase cancellation and will provide a smoother more controllable sound.

Peace