On paper, the idea that DSD converted to 176k PCM seems like a good idea. But, never having heard a shoot out vs. 88k, I do not know for sure. Some commentators lean one way, some the other. The Secrets of Home Theater/High Fidelity site, for example, published graphs showing much more ultrasonic noise between 88 and 176k, which they felt could be detrimental to the sound in the audible band. 88k conversion stops noise above that frequency dead in its tracks. But, they published no actual listening findings to back up their theory.
Yamaha also makes a player with 176k conversion, incidentally. But, I have heard no one rave about it vs. an Oppo at 88k. Kal reviewed it in Stereophile, and did not appear to hear huge sonic differences vs. his reference Oppo. He seemed to feel conversion bit rate was more of a mental thing than an actual sonic thing. He has heard quite a few players, unfortunately not including the cheap Sony Universals.
There are many more things that can affect the sound via HDMI of a player other than DSD-PCM conversion, jitter levels, for example. So, I think the thing to do is listen in a specific system. The specs do not necessarily tell the story.