As long as you understand that the type of input or output jack (RCA vs XLR) makes very little difference per se. What I think you want is a balanced phono stage that truly processes the phono signal in balanced mode. Such a preamp will typically provide XLRs in and out, but some of them also provide RCA inputs, for tonearms that have only RCA terminations and customers who are not competent to change over from RCA to XLR. A single-ended phono stage will almost never have XLR inputs but might have XLR outputs as an option. Sometimes XLR outputs on an SE stage actually sound less good than the native RCA outputs, because to generate the balanced output signal, the phono output has to be processed one more time, either by going thru a transformer or thru a buffer of some kind. Maybe you know all this, and if so, I apologize for the pedantry.