i was in the same boat as you a couple of months ago. i have a good working sony 9000es and use it mainly for cd and sacd playback. i did not like the sound that it was providing from cd playback. sacd playback is very good though. i looked into getting it modified (to tubes). i also look at purchasing a cd only player. in the end, i didn't want to give up sacd playback, and i do like the option of using it as a dvd player. I ended up buying a used $3500 Audio Research DAC for less than a $1000 for cd playback and couldn't be happier.
good luck.
good luck.