Hi Samuel, I ended up spending over one year listening to many top preamps in my system, in my room. Among those that I auditioned in my system are the VTL 7.5 series 3, Dartzeel 18NS, and several other. I ended up preferring the new Krell Phantom. Like you said, the bass is unbeatable. Happily, with right combination of other components, the soundstage, timbre and detail is as good as the VTL 7.5 series 3 and Dartzeel 18NS too, so I am making no compromises, and I am very happy. Perhaps you should audition it some day.
I am not conflicted in saying this since I don't work with or am associated with any audio company of any sort, I work in the financial sector. Cheers.