I have QLN Prestige 5 and I am using an Audio Hungary Qualiton X200 (Blows Raven Away) and the Bel Canton e.One REF501S with REF2.7 DAC (Again Blows Raven Away)
The Bel Canto is Class D and is on all day as I work. I use the X200 in the evenings listening Analog and Digital.
Cheers.