You have a good point with the dual componet color from Canon.
If I remember correctly the pitch from Canon was the developer mixed with toner is your monocomponet, which will keepprint and copy quality very good over the long haul because you never run low on developer like the dual process that everyone else uses.
When it comes to Canon's Pro units, I don't know if these are dual or single, what I can tell you is that I prefer the halftones on dual better, but the knock is that as the developer runs low, image quality will suffer quicker than that of monocomponet toner. WHEW! Hope this helps, does nayone else have any input on this?
Art