I find both the Rogue 99 and Bat preamps (not amps) to be very veiled. I prefer the Cary SLP98 to both of them, which seemed more transparent in auditions. It also is a piece of eye jewelry ;)
Of course all 3 colour the sound, which may or may not be your cup of tea.
KeithR
Of course all 3 colour the sound, which may or may not be your cup of tea.
KeithR