This is all very interesting to me because I have been racking my brains out trying to figure this all out too. I'm an old fart with digital audio.
Turns out that the Grace GDI-IRDT200 HiFi Internet Radio Tuner was exactly something like I was looking for but its no longer available.
Like the OP, I would also like a component style unit instead of using my old iPod Touch G4 with the TuneIn app through my PURE i20 DOC/DAC pugged into my McIntosh C50 preamp.
I read that the Yamaha WXC-50 has a high quality DAC. Does anyone know if the Yamaha WXC-50 will perform this function using my laptop as a source of internet radio wirelessly (wifi) to the Yamaha then plugged into the McIntosh C50 preamp. I don't quite understand how to find something to do this. The guy I called at Crutchfield said the Yamaha WXC-50 is only a one-way interface and it wouldn't work with my laptop for internet radio. He said just to use the vTuner built in.....but I would prefer to use my laptop and internet. Sorry to hijack this thread but I'm lost. Thank you.