The Pi is known to need a tad over 5V to be reliable, so it could be that your supply was a bit under spec.Maybe I had a defective PSU as sometimes volumio would only last a few days before corrupting. The same went with moode. The supply was the only thing I changed and it's never been a problem even once since.
I put one in the bring & buy at Stoke last weekend - could have had it for peanuts. Contact @Bazzer if you want it ...I know I've mentioned this before, but if you want a cheap LMS based streamer / streaming amp, you could do worse than find a defunct Simple Audio Roomplayer and install Squeezelite on it. My last one (without amp) was about £16. The amp version has 50W ICE module. No need for a separate case or power supply as it's all included. No WiFi... just ethernet or built in ethernet over mains.