... I'm interested in its IQ, though...
While I can't compare it against those three lenses (I do not have them), I can show you the IQ that blew my mind on the first day of going out with it.
So I went to have lunch outside... saw a nice-looking girl in a cafe next to the restaurant. Took a few shots of her candidly (I did approach her later and sent her pics via email; she was delighted). All 200mm, at 2.8:
In the first picture, she had her head down, face covered by her hair... since the camera was set to eye focus, it started looking for alternative focus points... then she suddenly lifted up her head and turned around... the camera instantly jumped to the eye and I clicked.
To give you an idea of the distance I was shooting from, I am attaching the full frame too.