It would be helpful to you if you provided a budget.
Many, most sub $2000 sa/cd players are not actually TRUE BALANCED, so you will not notice any difference aside from the fact that XLRs are a vastly superior connection to RCAs. Also your amp/preamp needs to be TRUE balanced as well
The least expensive true balanced SACD player Im aware of(and I own) is the Oppo 105, which can be found ~ $800- $1000, more if it has an aftermarket upgraded LPM. I saw one a couple days ago modified by EVS. If you can afford it, that would be the one
Now, once get that far, pretty much all XLR cables sound different
hth