One Box Player for digital/Sonos

Not sure if I should have put this on the amp or digital section. I have the two channel rig I love. Heck I haven't bought a cd player in four months. I do have a small surround system for movies which is pretty cool.

I listen to music all of the time on my Sonos system outdoors (back porch/camping area)at my home with a beautiful view. I have some old int amps and small bookshelf speakers around and it actually sounds pretty good.

I am pretty educated in gear but I am looking for a one box player or something easy to carry outside in a pinch.
I know Bose/Boston and some othe companies make them, but
I am sure I am missing something not being as familiar with this gear.

Prefer an RCA two channel in but will use a mini jack if needed of course.

Any suggestions up to $1000......does not have to be that much. THANKS