I'm a big DIY fan and have a raspberry pi that I use to emulate video games, but I will say that my wife bought me a Sonos 4 years ago and I've found it to be such a great purchase even for a cheapskate like myself.
Unlike almost every other piece of technology in my house, sonos just works. I've never had to unplug or reboot the thing, I've never had a problem with the phone controller app. It integrates spotify, Pandora, etc seamlessly. I have two of them and they can play the same music in perfect sync, or split and play two different streams of music. No lag, nothing. I feel like a salesman writing this. I guess I'm just saying that if 500 is something you can afford, a sonos is one of the better uses of your disposable income, especially if you think there's a good chance you'll buy a bunch of DIY stuff, never get it working right, and give up.