LP-UNF

That’s bit small budget if you want to fill out your whole room. Usually that budget active studio monitors are intended for desktop usage (i.e. about arm’s length away). Like e.g. Kali Audio LP-UNF (EAC review) (Thomann listing). JBL or Adam active studio monitors could be slightly bigger in your b

Another issue is headphone mixers are sometimes too conservative with panning. Try this... Build up a strong mono mix with everything centered. Then at the end, pick just a couple or few elements and pan them out wide to the sides. That's all it takes to have a wide sounding mix. Here's a great vide

Just buy them. The only thing close that is an enclosed, no other expenses system that’s worth the money is Kali Audio LP-UNF. The other two options from KEF are not usually desk friendly at over 11” in depth. You’d have to have a WiiM Amp with room correction to effectively take the bass nulls and

I can't say enough about the Kali Audio LP-UNF monitors. They are designed for small places, mean to sound best on your desktop at arms length. I've had mine for almost a year now and absolutely love them.

The Kali Audio LP-UNF monitors were designed for this exact scenario so check them out. I absolutely love mine.

For small spaces, I love my kali audio LP-UNF with kali sub.

Thank you for your extensive reply, I'm going to focus on the PC set-up first: I really like the functionality of these Kali Audio LP-UNF near field monitors, they're € 345 for a pair and I'll need a longer connection cable (€20) to hide it properly as I currently have a 44" 32:9 wide screen set-up

At around 300-400€ you are probably limited to desktop oriented powered speakers. I.e. they might be bit small for filling a whole room. My usual suggestions in that price point: Kali Audio LP-UNF (EAC review) IK Multimedia iLoud Micro Monitors Adam Audio D3V (EAC review, EAC YT review) Kanto Audio