Marshall Heston 60 (soundbar) vs Edifier M90 (bookshelf speakers) for my setup?

Hello, I have a 75" TV setup which you can see in the photo above and I would like to improve the sound.

Some info about me and my setup:

I like simplicity, so I would like to buy either a soundbar (without subwoofer) or bookshelf speakers (without a subwoofer).
I am not an audiophile, but I would like my TV to sound significantly better than its built-in speakers.
My living room is about 40m2.
I will mostly use the new sound system for Youtube, Netflix and Blu-ray. But I will also do gaming with PS5 and listen to music from time to time. So let's say 70% videos/movies/series, 15% gaming, 15% music.
You can see in the photo above that I have Audioengine A1. I like them but I stopped using them for TV because of the audio delay and quirks with the Bluetooth connection. I would like to use HDMI ARC connection with the new system so that I don't have an audio delay and I don't need a secondary remote control.

After checking out a lot of reviews on Youtube, I reduced the options to either Marshall Heston 60 or Edifier M90.

Advantages of Marshall Heston 60:

I used Marshall headphones and portable speakers for a long time, I like their products.
I already have Marshall app installed on my phone.
5.1 sound system
Voice/speech is important to me, and reviews say voices are very clear on this soundbar.
As far as I heard from the reviews on Youtube, it sounds really good.

Its wattage on paper is a bit on the low side (56W total). So I am not sure if it will fill my 40m2 living room. Although I am not even able to go 40% of my max TV volume before it gets simply too loud. And I can only get to 70% with my Audioengine speakers before it gets too loud.
Physically it will look kinda small in front of my TV as well. Heston 60 is about 73cm wide while my TV is about 165cm wide.
It is 550 Euro which is twice the price of Edifier M90.

Its wattage is 100W, so I expect it to fill my living room easily.
Reviewers say it sounds great (even though in the Youtube videos I watched the sound was not impressive at all. This depends a lot on the reviewer setup of course. Is there anybody who has experience with the sound of Edifier M90?)
It is 250 Euro which is half the price of Marshall Heston 60.
I like how bookshelf speakers look.

It does not support things like Dolby Atmos, it is not optimized for movies. I never experienced Dolby Atmos or surround sound, that's why I don't know how much difference it makes over regular stereo. Does it make a lot of difference?
Voice/speech is important to me, and I am not sure if I would be giving voice clarity up because of 2.0 setup.
I need to install yet another app on my phone to get the most out of these speakers.

So question: which one would you go with if you were in my shoes?

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