A number of preamps have XLR outputs but are not truly balanced, if that’s important to you. Easy answer for one that is both is a Schiit Freya + (and it’s rarer cousin, the Freya N). Sells new for $899 plus tubes and available used for reasonable prices. There are others that cost much more, and some of them will sound better…
I’m listening to my Freya N right now through a Music Reference RM200Mk2, which has balanced inputs only. But it also sound good with my diy Pass B1,which is single-ended only, using an XLR to RCA adaptor. YMMV