My fave? Without a question - the Silver Eagle if you can get a good one. Pay thru the nose - you will. Which ones do I own and use? I have the next best thing to a Silver Eagle, the D104/T-UP9 - and can be found at half the price of a Silver Eagle. The only real difference between them is cosmetic, so be happy. They both have 2 key switches; one on the side of the mic - and the other on the base.
The base switch is my favorite part on these mics. When keyed, you can hear the distinctive and resonant 'clink' and the awesome modulation that follows. Keep your background noise to a minimum, or choose it carefully to color your distinct sound. I keep mine at a distance of my outstretched arm, so that natural slap echoes from the room return subtley to the mic. Don't need to talk loud or directly either; let the mic put out that sweet sound. They are very sensitive, so use you modulation meter bridge and adjust your final modulation on the radio mic gainaccordingly. Turning up the preamp in the base of the mic to 80% on and talk like you would to anyone with normal volume of speech. Let the mic do the rest; it will. Sweeeet. What is the quality that makes it sweet? The resonance of the stand and the frquency responce of these Astatic elements - that's fo sho. But this is base-station talk; and it is clearly a winner on SSB as well.
Mobile speaking, I have a D104/M2 - an older one that looks as if it lost a nasty fight. Its pretty tore up, but can modulate with the best of them. It sounds best when stationery, and when moving it gets pretty noisy. I'm afraid it has seen better days (had it for 20 years) and I need to get a new mobile mic - something that can noise cancel and still throws sweet modulation and swings well. The Turners are a fave of the truckers, because they cancel noise really well while rolling with all of that noise trucks can generate. They modulate well, but don't exactly sound sweet but are swingin. I guess it is a trade off. I was thinking about the Astatic Road Devil noise-canceling mic this time around. A little cheaper than a new D104/M5 - but does it still have that sweet & swing? That is the $50 question.
And how it works on SSB is a puzzle to me as well...