Sound quality of a Bryston BDA-1 vs the BDA-2 or BDA-3

Went to Audiocircle and saw comment from James Tanner (Bryston engineer) that the SQ of 2 and 3 was same, although a few folks disagreed.  
Not sure I fully understand and appreciate MQA, DSD and HDMI capabilities. I have no SACD player or SACDs and have no desire to play video. However if DSD and MQA are game changers and available now or in future via downloads, I will have to reconsider. 

Went to Audiocircle and saw comment from James Tanner (Bryston engineer) that the SQ of 2 and 3 was same, although a few folks disagreed.  
Not sure I fully understand and appreciate MQA, DSD and HDMI capabilities. I have no SACD player or SACDs and have no desire to play video. However if DSD and MQA are game changers and available now or in future via downloads, I will have to reconsider. 

@rockyboy, there's a fellow named Pete, who just compared BDA-3 with his BDA-1:

http://www.audiocircle.com/index.php?topic=138471.msg1638053#msg1638053

Appreciate you bringing that to my attention. 
Think I want to start looking for a used BDA-3 or Manhattan or even Brooklyn. 
Thanks again