Bluetooth sucks for streaming music in houses for most people like me. I walk away with the phone in my pocket and the music stops. Get something that streams through your internet with Airplay instead or a similar internet option. I use a bluesound node. I have had to restart it a couple times over the past year, otherwise it works well. I don't know much about the tech involved but I selected it because I read about the high quality conversions from digital to analogue (my speakers are not wireless so I need the songs converted) and I didn't want to get sucked into the Sonos universe that only works with all Sonos equipment. There are cheaper options like what Nick recs, I'm not sure if it's a big hit in sound quality to go cheaper, and I don't know if you have nice analogue speakers where you could tell the difference between digital/anologue converters/streamers.
Bookmarks