How about some active KEF LSX II speakers. These are small and supposed to be great.
If you can get them to fit, LS50 II (the active version with Meta). The KEF KC62 sub would be a breeze to integrate (even wirelessly) with the sub and the LS50, not sure if the LSX has sub integration. I have the passive LS50 Meta and KC62 sub in my small office and I love it.
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If you really want to get killer sound and ignore the dimensions of the bus, this will beat every suggestion offered including my KEF suggestion.
True Ribbon Headphones & Amplifiers | RAAL-requisite (raalrequisite.com)
- RAAL SR1a and / or CA-1a headphones. The SR1a is like 2-channel and the CA-1a is so shockingly powerful and like traditional headphones.
- RAAL-Requisite VM-1a headphone amp ($6.9K)
- RAAL-Requisite HSA-1a headphone amp ($4.5K)
- Schitt Jotenhium R headphone amp ($500)
The VM-1a amp will give you reference level sound. Some say the best headphone sound regardless of price. I do not have much headphone experience to compare. The SR1a are not like headphones though, more like 2-channel. It was better than my 2-channel speakers in my small office so I sold the speakers.
I like a cheap bright DAC with the VM-1a (Benchmark DAC3B). With the other 2 amps a warmer DAC is preferred.
BTW - I have both the SR1a and the CA-1a. I use the CA-1a when laying in bed and the SR1a when sitting up at my desk.