does your Sony player have a digital out? if so you may want to try a stand alone DAC as you'd get more bang for your buck if the Sony can handle the disk spinning part for another few years. Other then that your choices are going down every year with more and more people moving to hard drives and streaming. So I'd imagine the ones you have mentioned will all be fine may want to have a listen to them if you can.
You may want to mention a budget as well so you don't get prices all over the place. also what are you going to plug the CD player into?
I would not worry to much about the output impedances for those CD players they should all be fine in those ranges ( see question above about what your plugin it into). Unless your going to run a really long set of cables or have one of those rare supper low input impedance preamp - amps you should be fine.
You may want to mention a budget as well so you don't get prices all over the place. also what are you going to plug the CD player into?
I would not worry to much about the output impedances for those CD players they should all be fine in those ranges ( see question above about what your plugin it into). Unless your going to run a really long set of cables or have one of those rare supper low input impedance preamp - amps you should be fine.