There is no such thing as "the best" condenser mic, there are so many factors to consider... For example individual sound, room sound, type of music, other equipment used. Personally, I'd always prefer a ribbon mic (for example a Royer 121 or a Coles 4038) to a large diaphragm condenser because I don't like the accentuated bright top end. Having said that, we recently got a Flea 12 http://www.flea-microphones.com/mics_vintage.html - It has a beautiful smooth, silky top end - I absolutely love it!
I started a recent thread around here about budget microphones.
I added this to the collection
and it is a great companion for my nohype ribbon. I never thought to a small diaphragm on the bass clarinet, but it works great.
The ribbon is more coloured, the CM3 more defined. If I had to step up on microphones to record a saxophone, the Coles would be my choice. Probably no condenser would equal its quality at that price range.
EV RE20 (similar to davesaxboy's choice) is another great option. Wonderful for live too.
I would not agree that all Neumanns are great/equally suitable for sax. Unfortunately the Neumanns they don't make anymore these days are arguably the best ones. There is just no modern Neumann that's anywere close to a U47 or U67, the U87 is pretty much an industry standard and a very good and reliable mic, yet I don't think it can beat a good ribbon or valve mic on sax. Btw, it's not just about the mic, the preamp makes a massive difference, too.
Were all of them C12 inspired?