PS - the power on this is limited - probably good for a desk top or efficient speakers in a room that is not too large - http://www.accessories4less.com/make-a-store/item/teacah01-p/teac-ah-01-stereo-amplifier-with-digital-to-analog-converter/1.html
I have stand alone Teac DAC (UD-501) in my...
As of late there are a ton of these small portable DACs and many rave about the sound from some of them (like the iFi DACs)
http://www.amazon.com/Audio-Nano-iDSD-Portable-Decoder-384kHz/dp/B00R5HO426/ref=sr_1_4?ie=UTF8&qid=1430835611&sr=8-4&keywords=ifi+dac...
Here's an example of another integrated amp with a DAC - http://www.accessories4less.com/make-a-store/item/yamas301bl/yamaha-a-s301-stereo-integrated-amplifier-with-built-in-dac/1.html
or products like http://www.nuprimeaudio.com/index.php/product/dac-headphone-amps/portable-dacs/udsd which is...
Also note there are integrated amps (a bit more money usually) that have DACs built in - http://www.accessories4less.com/make-a-store/item/marpm6005/marantz-pm6005-integrated-amplifier/1.html
To use something like the above with a laptop you would need a USB to coax digital converter.
Note that the Yamaha noted in your original post has provisions to work with an iPod as I noted earlier - http://www.accessories4less.com/make-a-store/item/yamrs300bl/yamaha-r-s300-natural-sound-stereo-receiver/1.html?gclid=CMvz4ujBqMUCFWgV7Aod7hcAoA
JRiver would be your player and your music library would include the iTunes (which compared to jRIver is not much of a player and I have it and it is fine for the iPod for the car) music library. JRiver has a forum (https://yabb.jriver.com/interact/ and there's a whole section for Mac) and I...
There's positives and negatives to each scenario. Some receivers may be iPhone compatible which means they have functions that work with it. A DAC for 2-channel bypasses the circuitry in the receiver which typically drags the signal through more stuff. A DAC can handle higher resolution than...