Welcome to the forum.
If funds permit, I would recommend the B & W 800 D3.
A very good friend has a pair. They are quite the best commercial speaker I have yet met. I have had a chance to measure them., and of course listen to them extensively.
I have not heard those Dynaudio speakers. However I'm yet to hear a Dynaudio speaker I did not like.
Those Dynaudio speakers use first order crossovers which can create issues of sweet spots and difficult room issues. Having said that lower order crossovers do have a lot to recommend them.
The lower end of the B & Ws goes close to an octave lower then the Dynaudios. The B & W speakers definitely do not need a subwoofer. The bass is deep and clean.
Unlike previous speakers in the 80 series the 800 D 3s are not a difficult load, and you do not need the expense of Monoblocks. My friend is powering them with a dual channel MAC 400 watts per channel.
This is my measurement of the impedance and phase angles of the 800 D3.
This is the frequency response on and off axis. Blue line is on axis, black line is 90 degrees off axis,
Waterfall and impulse response.
These are excellent results.
You won't go wrong with the 800 D3. If you can afford them go for it. They are an astoundingly good speaker.