As daft as it sounds, the SMSL Q5 Pro I have would suit your needs (3.5mm jack, optical, usb and coaxial RCS in) and one set of speaker outputs
It's done me brilliantly, ran it with the likes of KEF LS50s, Rega RX1s, Wharfedale Diamond 9.1s, B&W 685s, KEF R100s etc
For £55 is a belter of an amp to faff around with!
However, if you're after something more mainstream, there's a NAD D3020 over on AVForums that could be of interest to you
My Office : M2 Mac Mini Pro > Focusrite Scarlett Solo USB interface > JBL 308P MkII active studio monitors on Atacama SL600 stands via Van Damme TRS to XLR balanced cables
The spare room : Music via Apple Music > ATV3 > optical into a Fiio D3 DAC > Arcam Alpha 10 integrated > B&W 602 S3s or AE109 speakers - Van Damme cables