I got my Muse M4 for just under US$100 on AliEx. That's incredible value. Already own the BTR5...which is also very good. But the Muse M4 is my favorite...especially with its support for BAL 4.4mm (and BAL 2.5mm + STD 3.5mm)...with PLENTY of power for my sound gear...excellent battery life...solid build & design quality...and separate USB-C ports for power and signal. If you need a lot of EQ capability, then I suppose the Qudelix 5K would be the go to device at a similar price point to the Muse M4 (or the new FiiO BTR15, for that matter). EQ'ing away from my PC is just not my thing.