The converters used in studios to down - dither from high Rez to 16/44.1 / HDCD are much better than average studio gear, Pacific Microsonics converters are great sounding. Even the "regular " 16/44.1 version sounds good.
Generally speaking and based on recording live events and being in studios, I would say only a few pro converters sound as good as high end converters. You would think it would be the opposite but that's not been my experience and why I a naturally skeptical when one of my pro audio friends dismisses an audiophile friend of mine.