I'm digging into some tubed preamps in this price range two, so my two cents:
XLR & RCA: Aesthetix Calypso
XLR only: Atma-Sphere MP3
RCA only: Lamm LL2, First Sound Presence, Audio Valve Eklipse, all very good performers in bass and dynamics.
FWIW, I started looking for balanced only and as I researched more I discovered some people prefer driving my amp from RCAs (McIntosh MC275). Not sure what your case would be.
XLR & RCA: Aesthetix Calypso
XLR only: Atma-Sphere MP3
RCA only: Lamm LL2, First Sound Presence, Audio Valve Eklipse, all very good performers in bass and dynamics.
FWIW, I started looking for balanced only and as I researched more I discovered some people prefer driving my amp from RCAs (McIntosh MC275). Not sure what your case would be.