No... you have things very wrong.
The ONLY advantage to inkjunk is that you could potentially run extremely long paper through them.
Print quality of inkjunk is GARBAGE unless you spend $5 per page on paper. Laser printers print the same regardless of what kind of paper you put in them.
Noise is practically non-existent on a laser -- you hear, at most, the sound of the rollers turning. None of that head shaking nonsense.
Alignment.... laser printers line everything up perfectly. Inkjunk has a head that moves back and forth across the paper and each stroke is always slightly out of alignment from the last stroke unless you overlap strokes, in which case you get BLUR.
Separating the ink from the head does NOT reduce costs -- they (the manufacturer) profits more that way because it costs THEM LESS, but they get to charge you the same.
And laser printers are just as refillable as inkjunk.