Replace pre-amp

I have a Lazurus cascade tube pre-amp. I like the sound but one channel gain is lower than the other and I don't know if a fix is cost effective or not? Yes, I've tried different tubes. Any recommendations on a tube pre-amp with phono stage for $1500 or less that would be as musical as the Lazurus? Thanks. I have an SS Oddysey Stratus extreme amp, Nestorovic 5 AS speakers and a Marantz 2400 sacd/cd player.