I do remember trying the MC012 in the past as I did own one. The poping on it was real bad. If I remember correctly, it sounded kinda boxy. Its been some time though with that one as I was not really thinking to use it as a vocal mic. A friend I know has one. Maybe I'll borrow his and give it another go.
The 4033 suggestion looks real interesting to me. Medium diaphram would be fine too.
The Behringer mic, well I don't know. That one is really cheap and there is always something wanting in Behringer gear. Their stuff never quite goes all the way.
I'm looking for an open, defined, but not overly bright vocal mic that doesn't sound boxy and accurately captures my voice. Many of the ones I have tried can sound boxy and a little fuzzy in the high end (lack of definition, maybe premature high end roll off). Even with the mods I do to improve quality, I just can't seem to make a great high end studio mic (a silk purse) out of audiophile gear (a sow's ear). The M9 is my best modded mic to date. It's on the edge of greatness.
I can record intruments and amps well but when it comes to vocals, they seem to be more of a pain to get them to sound open and natural like those recorded in good studios with expensive gear.
Exploring the rehlm of pencil mics/small/medium diaphrams opens a new avenue. Maybe the right one, tweeked the right way, will deliver performance thats many times more than the time and money invested.