Tb1?
I had a TB1 initially on trial. I ended up returning it and getting a B1 and C1 instead (and have later added a NT1000). The TB1 sounded pretty nice to me; reasonably faithful without a strong colouration, but with a subtle tube sound. The top-end sounds slightly more tamed than on the B1. Think of it as a B1 with a tube-like sound.
Why did I return it? Well, the option for me was to pick that _or_ the C1 (together with a B1). The TB1 had a subtle difference to the B1 -- I could tell it -- but it wasn't _that_ different, and I assumed that the B1 and the C1 would be giving me a wider range of choice.
My reasoning was like this: The C1 is more colourful, and as such nice to have. I would not have liked, however, to be "forced" to use the C1 always, so a less colourful mic such as the B1 would be needed also. But if the (T)B1 was going to play the "plain" mic, then maybe I would need the clean sound sometimes, not being forced to always have the tube sound. So... C1 alone? No. TB1 alone? Still no "plain" sound. B1 alone? No option to colour? C1 and TB1? Still no "plain" sound. TB1 and B1? Too similar... so C1 and B1 it was.
As a "compensation" I then also added a VC3Q type of pre-amp, that can give a nice warmth. No tube mic, but a bit similar distortion with e.g. the opto compressor in the chain but not set to do any "real" compression. And later I've added a NT1000 to the LDC locker (I also have some oktavas, shure/AKG dynamics and others).
-- Per.