I’ve had a couple of the AQ dongle models too.
For my iPhone and iPad portable enjoyment, I went with the TEAC HA-P50 a number of years ago. (…this model is now discontinued ) .
Beat the AQ in performance IMO, and its still going strong for me,
I’d look at something in current make and model options in this pricepoint strata (or this one Pre-owned …just sayin’) as your next go-to unit. Fugeddaboud the AQ USB models, as you have already pointed out.