I bought the SMSL DA-8s a few months ago and was amazed by the performance. I just purchased the SU-8 and connected with XLR. Again, I'm amazed.
I considered the SU-9 but couldn't talk myself into paying for the MQA. I have the Blue Note MQA collection and think it sounds fine when reproduced with MQA but I prefer DSD. So, MQA isn't important to me yet. My dollars go into DAPs and Headphones.
The DA-8s/SU-8 is for my near-field AudioEngine HDP6 (not-very-efficient) monitors in my home office. Perfect for my needs.