I just bought a CAD M9 Tube microphone, and have been using it on vocal tracks.
So far, I'm very happy with it. It's better on my voice than the other microphones I've tried (AKG C414B ULS, AKG C1000, Shure SM57, and Samson C03). (The AKG C1000 is also a great vocal microphone, and darn cheap, which shocked the heck out of me). It's got lots of "tube tiz", but I haven't needed to de-ess any vocal tracks yet. My best results so far have been singing extremely close with a pop filter screen, and not engaging the high pass filter on the mike, then removing the low frequencies with a high pass filter on the track.
One issue: the power supply makes noise. I tried different plugs in my house until I finally plugged it into the power conditioner power bar that I use for my computer and monitors. Then it was decently quiet--quieter than
the Samson C03 (which is a fairly noisy solid state 19 mm condenser), but still quite a bit noisier than
the AKG C414B ULS (which is very quiet). It's not the kind of noise you could use a noise reduction plugin on, either; rather, it's kind of a swirling noise sound, like it's picking up RF signals. When I engage the 16 dB pad, the noise floor doesn't diminish, and of course the noise increased as I increased the preamplier gain, so I wouldn't use the pad unless absolutely necessary.
I'm going to give it a serious try on acoustic guitar, too. First impressions after a quick test were good--warm and inviting tone without a hint of harshness.
I guess I'll be looking for replacement tubes next, to get some different colouration options in the tone. I'm hoping to get a warmer and fatter tone from farther away.
I paid a lot more than Musical5 did, but I still think it's one of the best deals in tube microphones around.