In my experience, the larger the transformer is in the Amplifier, the better it will sound (Solid State).
Class D is a bit different there, but a quality power supply in the Class D is important.
If I have this correct, the larger the transformer, the more current it can deliver (I may be wrong here) - I do know that the Dyn’s that I have are current pigs, and they sound phenomenal with high current amps and lean with lower current amps.
I have heard a lot of class D lately that sound really good.
My next Amp-Go-Round is going to be Purify’s with a tube input buffer stage (If I have that r=terminology correct).
In summery, like an above post stated, ‘Heavy is Good’ - most of the time.
My 2 cents