For the iPod, go with this dock that has an in-build DAC that has got great reviews:
http://www.amazon.com/PURE-i-20-30-Pin-iPhone-Speaker/dp/B0049MOK92/ref=sr_1_1?ie=UTF8&qid=1369758955&sr=8-1&keywords=Pure+i20+dock
Make sure your iPod is compatible with this dock. Also you can read about this dock here:
http://www.audiocircle.com/index.php?topic=93591.0
http://www.amazon.com/PURE-i-20-30-Pin-iPhone-Speaker/dp/B0049MOK92/ref=sr_1_1?ie=UTF8&qid=1369758955&sr=8-1&keywords=Pure+i20+dock
Make sure your iPod is compatible with this dock. Also you can read about this dock here:
http://www.audiocircle.com/index.php?topic=93591.0