Very small room systems and synergy

Hmmm well you may have jumped the shark a bit comparing the sound of ls50s to early cheap boom boxes.

I’ve heard ls50s sound both very good and very bad in my home. They are not at all suited for larger rooms. In smaller rooms they can shine. For serious listening I agree a sub is needed but in fact for bass extension not to fix the parts the ls50s do. 

It’s all in the setup.

Having said that there is no single speaker design that appeals to everyone. No two people or pair of ears are the same. Some are successful because they do have large appeal.

Also I replaced a Class A amp with Class D and never looked back.

Different strokes.....

Reven6e's post was how I pretty much feel about the LS50's. I've tried moving them changing the rooms acoustics but just don't get that spark.  What some call the "mid-range magic" that small monitors are know for.  Best sound I've had in a while where some Q Acoustic 3050 towers that sounded great but were to big and boomy for my small room.

What I would say is that to some extent. Is that cost is a limiting factor.
The Current Technics Line Up is quite good and priced at three levels.
Though don't give up on what you have until you have you can evaluate and hear the difference yourself.
A local HiFi dealer should be helpful for demo gear and evaluation in
your system.
After checking out (reading about) both NuPrime IDA8 and LS50. 
I think that both choices are outstanding.
But $1000 for an integrated is A Low price Range.
Although I am coming down on the side of Hybrid Integrated.
And that L/R Mains Position and Set Up are of great importance!
Also note that Planar Magnetic sound is very different sound field than 
Dynamic Driver Set Up.
A SubWoofer could be used to reinforce Low End.
If no one will believe me then refer to below video.
https://www.youtube.com/watch?v=cTnituQu8ig



 

I mentioned small rooms only for ls50 but should also add amp matters a lot.

They sounded weak and totally dreadful in my larger room off a highly regarded 180 w/ch zero feedback Class A ss amp when another agoner brought his pair over a couple of years back.

Then we tried them in my wife’s 12x12 sunroom off highly damped 500 w/ch Bel Canto Class D and viola.

So results can run the full gamut with these easily for sure.

I'd say the pro reviews of these I’ve read are mostly on-target so recommend anyone considering read up.

I have never taken Q Acoustics very seriously but on occasions I did demo some of their speakers. They are not the most transparent or detailed but they have a pleasing sound and I think you might have something there.

Have you thought about giving some of their bookshelves a try, say the Concept 20s for instance? A stand floor will never work in a small room but, if you like their warm sound signature, I think one of their smaller speakers is definitely worth demoing in your room!