I just bought a used Logitech Squeezebox Boom.
We decided against putting a system on the 3 season porch and on the deck, and figured this way we can just take the tunes with us wherever we are.
SQ won't be as good as dedicated systems everywhere, but this little bugger puts out pretty good sound for a small boombox. And it is much smaller than I expected, but VERY solid. Heavy little guy.
Its pretty sweet and will sync to my main system so I can listen to my main speakers in the house and when I go on the deck to flip the burgers...l can take the Boom with me.
Only thing I have to worry about now is how long Logitech will support it. Thought for a moment about going all Sonos, but after doing some recent upgrades...I figure this will work for awhile and I can upgrade later if needed.
Pretty happy so far...