I don't currently have anything. I don't even know where to start to put together a budget.
Like is there a receiver that can accept multiple wifi/bluetooth speakers and a connection from phone and/or computers?
I know with the Google speakers you can have them all over and create multiple groups so that you can "cast" to certain ones. I don't want my all my speakers listening to me though.
You could start out by making a main system with wired speakers in the room you're most likely to listen to music (living room/den) with something like this:
The new WiiM Amp is a compact streaming amplifier that turns any pair of passive speakers into a modern streaming audio system for only $299. It offers 60 wpc, HDMI ARC, bass management, and ESS Sabre DACs.
www.audioholics.com
This has the bases covered as far as connectivity and you can send music to it from your phone or computer. What I like with this is it has a sub-out making adding a sub easier. Small speakers lack bass.
Then get a small speaker which you could put in or carry to any other room. Type "speaker with Chromecast built-in" to the amazon search. There are many relatively inexpensive options. Of course, the KEFs are nice but pricier.
You could even forgo the main system idea and get as many as these small speakers as you need.
Going with a main system gives you the ability to use good speakers and a sub for an exceptional listening experience.