Need suggestions for streaming files to my stereo

Hello everyone. I'm looking for a way to stream files (AAC, ALAC, FLAC) to my home stereo. The files are on my PC laptop, or on iTunes on my iPhone etc. I pretty much exhausted my budget on my power amp and speakers so Im looking for the best budget pieces I can afford to get the music flowing for now. I currently have Kef ks50s, a Red Dragon S500, a SMSL Sanskrit, and a Google Chromecast Audio.   I'll likely pick up a Schiit SYS preamp. 

With this current setup I can only pretty much stream Pamdora, since Itunes won't work with the CCA.   It's looking like the lowest cost option available is to use different software to handle the music files such as JRiver, or PowerDVD Ultra, but I'm unsure if this is the best way?  Any other ideas, software, hardware etc?  I have an insanely low budget of around $200 left to buy the rest, let's see what you guys can think of.