Top brand speakers

Bo1972 is partially "pulling his punch" here. The weakest link in a Naim System is typically the speakers. You CAN get 3D sound from a Naim System, providing you don't attach Naim Speakers. Totems; Harbeths; and some Dynaudio models match extremely well to Naim. In contrast, if you attach Naim's own NSat speakers to something like a Naim Nait 5si, you will indeed get 2D sound.

Here's a more striking example: Magnepan makes some great speakers. The Ayre AX-7e is a great integrated amp. For a chuckle, I asked my dealer to attach an AX-7e to a pair of Maggie 1.7s. In a word, YECH!!! The resulting sound was sterile, detached, fatiguing, and uninvolving.

The point here is that you are trying to build "a system" that reproduces recorded music based on your personal preferences. A good Audio shopkeeper will take the time to direct you to gear that matches your sound & musical preferences given your budget. Selecting speakers is a big part of building such a system, but not the only part. In the end, the parts will need to work together, and within your room parameters, in order to yield a quality sound.

Returning to Bo1972's comments, if you happen to LIKE the Naim sonic signature (many people do) and can afford the gear, don't be afraid to purchase Naim. Just be sure to match speakers appropriately. (FWIW I don't own Naim, but have friends who enjoy their Naim systems)

"The weakest link in a Naim System is typically the speakers. You CAN get 3D sound from a Naim System, providing you don't attach Naim Speakers."

Not me. And it wasn't for lack of effort either.

Naim has a different focus on sounds and image compared to highend brands like Pass Labs. It is another world. I don't say that you cannot enjoy it.

This is a matter of taste, but I have listend often to Naim equipment with other speakers as well.

The image is still a lot different, less intimate en less precise.

I just got "The Complete Guide to High-End Audio" by Rober Harley and will read it.
I would appriciate if anyone can comment on:
"Any suggestions about my old Creative Gigawors S750 - the build in amp was class D, I think the speakers are still good to use with an nice extarnal one, but what exactly? :)"

Welcome to the rabbit hole