a survey such as this is very difficult only because it's too open ended, and subject to personal favorites, vs. test data...that being said some obvious choices are:
1) Zanden 9000 series 300B's
2) Tube Research Labs GT 400 & 800 series
3) Convergent Audio Technology JL-2 Signature
4) Kondo Ongaku w/KSL technology
5) Shindo Labs
6) Wavac HE-833's MKII
7) Lamm ML2
8) Tenor 300 Hp
9) Jadis JA 80's
10) SAP (Strumenti Acustici di Precisione) New Anniversary
Lord knows I've only scratched the surface?
i.e. FM Acoustics, Nagra, VAC, Joule, and so on.
1) Zanden 9000 series 300B's
2) Tube Research Labs GT 400 & 800 series
3) Convergent Audio Technology JL-2 Signature
4) Kondo Ongaku w/KSL technology
5) Shindo Labs
6) Wavac HE-833's MKII
7) Lamm ML2
8) Tenor 300 Hp
9) Jadis JA 80's
10) SAP (Strumenti Acustici di Precisione) New Anniversary
Lord knows I've only scratched the surface?
i.e. FM Acoustics, Nagra, VAC, Joule, and so on.