@cainullah I have not experienced the 8300A but I have listened to 2 examples of Audiolab 6000a based systems and the SQ from the Audiolabs was outstanding; the Audiolab sound and quality of amplification in their units is top notch. I don’t want to get my head bit off again and not "asking" you to purchase anything but I would suggest you seriously consider this. You are feeding a $5,000.00+ speaker system with a $1,700 avr from where I sit that is a somewhat unbalanced. Those Fyne’s you have really deserve better amplification than the Denon avr you currently have and the add on you are considering is a FAR superior peice of kit to what you are supplementing it to, thats just the truth. Just Take a step back and really reconsider what you are trying to achieve. I’ve been exactly where you are now. If you bring in the Audiolab 8300a you’ll hear for yourself how lopsided the amplification/ SQ is compared to the Denon and likely sell it to balance things out. The Audiolab’s are that fanastic sounding. Last thought; if you are considering spending what the Audiolab 8300a cost consider a used Parasound Hint 6 approx same cost (if patient) it is way superior to the Audiolab 8300a in every way again you’ll likely sell the Denon after experiencing either scenario because you cannot unhear it, both are that much better than what you have now and those Fynes really deserve better juice. Just a different perspective to consider...I hope this helps.
Beware, the rabbit hole is deep!