Cocobolo/Ebony vs Maple/Rosewood

[line6man]

I know that Cocobolo is supposed to be REALLY bad on your respiratory system when you inhale the dust, but I'm not aware of any allergies to either of those woods.

FWIW, some people are allergic to Pau Ferro wood.

isnt wenge dust really bad for you also?
ive heard that it can cause a skin rash like poison ivy does

Wikipedia:

The dust produced when cutting or sanding wenge can cause dermatitis similar to the effects of poison ivy and is an irritant to the eyes. The dust also can cause respiratory problems and drowsiness.[citation needed] Splinters are septic, similar to those of greenheart (the wood of Chlorocardium rodiei).