Grace Digital GDI-IRD4500m, the hi-end internet radio receiver for your stereo system
Unlike many brands that aim for a regular home use market, Grace Digital GDI-IRD4500m is an internet radio that aim for a higher market, if you are an audiophile who have an entry level hi-fi system at your home (3,000 USD up) and looking for an internet radio receiver that comes with many types of connectivity including RCA out, RCA in, 3.5 mm jack, and also a stereo speakers connection (yes, Grace Digital GDI-IRD4500m comes with a built-in amplifier),
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Grace Digital GDI-IRD4500m also comes with a built-in wifi port that you can connect it to your home wifi hotspot, it is a shame that this Grace Digital GDI-IRD4500m lacks of an ethernet port but it also comes with a USB that you can use a USB to ethernet converter if you want to connect a Grace Digital GDI-IRD4500m via ethernet cable for a faster connectivity and also a better audio quality (but in my opinion, I think I think wifi connection is good enough but if you want to try hi-res that is another story).

There are another choice that you may want to check out for a hi-fidelity internet radio receiver, GDI-IRDT200 that comes with a wifi connection, ethernet connection, and also RCA out.