Stereo system questions

[Craigis]

I have just purchased myself a new stereo amp.....long overdue, have been wasting my time with HT.
2 Questions:
1) I would love to know how much better the sound will be from the following sources.....playing a cd in a dvd player, or a dedicated cd player?
2) How long does an amp take to run in?

 

[slyr]

 

[santoshlv426]

 

[Craigis]

 

[Telephono]

 

[Craigis]

 

[Atjan]

 

[Atjan]

 

[mahleu]

 

[Ampdog]

 

[Craigis]

 

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[user 1447]

 

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[user 1447]

 

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[cj otten]

 

[user 1447]

 

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[user 1447]