If you have a choice allways buy a seperate amplifier,I donot care for dac included in amp for it is limited ,buy the best Dac you can afford.the dac is what will dictate in part tonal balance, detail,it is First before going to a preamplifier ,receiver you Cannot make up for detail later,once it is lost it is gone. That is why I try to buy the best dac I can afford if building a digital
Library ,buy a Big external drive 2 terabyte is so great value.seperate power supply is better - plug in less noise.
Wav files are best totally uncompressed,flac is second. My uncle is a recording engineer with over 30 years in the field. The new DSD downloads
Are tops, if you are buying a new dac you are better off waiting to buy a new dac with DSD capabilities for it is becoming more popular by the week.
And sacd is a DSD recording.Apple format can be converted to wav or flac files,the most accurate program around $40is DB Poweramp which accurately rips cds to digital files, and will convert any file format
Essential for any quality playback.