Get this Schiit Vidar amp for $800
https://www.schiit.com/products/vidar-2f
Get this Saga 2 class A preamp for $279
https://www.schiit.com/products/saga_2
It should take care of your dynaudio...all brand new with warranty and about 400 dollars left for other worldly pleasures.
I started with a great system and I managed to downgrade it to an OK sound through a lot of trades, sales, questionable decisions and shrinking budget. (No regrets, it's been a fun journey.) I ended up with very low sensitivity, hard to drive speakers and now I need more power. Will 100 Watts be enough and is it OK and safe to buy used? Any brands that are a good value at $1500?