My hats are 35 1/2" from the floor, which leaves them 5 1/2" above the snare. That still leaves me 3 1/2" of rod above the clutch, upon which I mount a tamborine about 1 1/2" from the top. I prefer a higher sitting position when playing so the top of my throne is 27" from the floor. I'm just over 6' tall.
I try to mount my other cymbals as low as possible, with the lower edge of the highest (18" left-side crash just slightly overlapping the hats) at 45" and the lower edge of the lowest (20" right-side ride) at 37 1/2", just 3 1/2" above and about 3" of overlap on the back edge of my 14" suspended tom.
This set-up leaves me in a very comfortable and relaxed sitting position with minimal reach required to get to any of my cymbals. See thumbnail for layout.