Using Sony 300 disk CD changer as transport


I am planning to purchase a DAC for my sister who currently is using a Sony cd changer mostly as a convenience. Preferrably I would rather buy a cdp since it is probably beeter in term of performance, but my sister doesn't want to have to change disk every time.

So I wonder if the Sony is a good transport and it is worth it to buy a DAC at all? This particular model only has an optical out.
andy2
Is your sister concerned about the sound quality of the changer, because if she's not, then why burden her with any of your audiophile aesthetics? For the vast majority of users a mega-changer system is far preferable than a single disc player.
I would suspect your sister would enjoy the convenience of a 300 disc changer, therefore if you have to use optical, go with a glass optical , and tweak away .
How much would a DIP help? There are a few Monarchy on sale but what type of improvement would one expect?
Post removed 
Andy,

I used to run MSB Link DAC II w/ a 70$ dvd player and thought it sounded great, better in some ways than my Cambridge Audio D500SE cd player, which is a well-regarded budget player. I moved on and sold the MSB to a friend who has a much more modest system than mine and who also reported huge improvements when the MSB was inserted into his system. These dacs can be had used for around 150$. They automatically turn themselves on and off when they detect a signal, so your sis wouldn't ever have to fuss with it, and if she doesn't like it or notice an obvious improvement, you could always resell it for what you paid. Worth a try.