Bluesound Node 2i vs Raspberry Pi SQ

I'm looking for the best sound quality and music server function under 500. Basically I want to be able to use my phone, tablet and PC as a remote to control FLAC files on an external hard drive. Streaming for youtube or Netflix would be nice, but I don't have a streaming service. 

Are there any R Pi solutions that can compete with the 2i on sound quality? Or Raspberry Pi + an external DAC? 

Also, is it possible to control either via foobar? That's my go to so far with my laptop.