As of now, the combined list of recommendations I've received (no particular order) is listed below. I need to determine which also offer balanced inputs;
- Herron Audio
- Pass Labs XP-20
- Plinius Tautoro
- Atma-Sphere Music Preamplifier MP-3 (option)
- Atma-Sphere New Music Preamplifier MP-1 Mk. III (option)
- Aesthetix Calypso
- Aestehtix Janus
- SimAudio P7 or P8
- Sonic Frontiers Line3
- Audio Research LS26
- Audio Research Reference 3
- Audiovalve Eklipse
- BAT REX
- BAT 52 SE
- Mcintosh C500
- Belles 28-A
- Audionet Pre G2
- VAC Phi Beta
- Audio Horizons TP 2.1 (option)
- Rogue Audio Hera
- Promitheus Audio Reference C-core TVC (option)
- Music First Audio MK II Preamplifier (TVC)
- Music First Audio Reference Preamplifier (TVC)
- Herron Audio
- Pass Labs XP-20
- Plinius Tautoro
- Atma-Sphere Music Preamplifier MP-3 (option)
- Atma-Sphere New Music Preamplifier MP-1 Mk. III (option)
- Aesthetix Calypso
- Aestehtix Janus
- SimAudio P7 or P8
- Sonic Frontiers Line3
- Audio Research LS26
- Audio Research Reference 3
- Audiovalve Eklipse
- BAT REX
- BAT 52 SE
- Mcintosh C500
- Belles 28-A
- Audionet Pre G2
- VAC Phi Beta
- Audio Horizons TP 2.1 (option)
- Rogue Audio Hera
- Promitheus Audio Reference C-core TVC (option)
- Music First Audio MK II Preamplifier (TVC)
- Music First Audio Reference Preamplifier (TVC)