The topic of "best" comes up so often here, but it's really not something that's possible to define when comparing microphones in such a general usage like we usually have to do in our home recording scenarios.
You can pick apart features, specs and response curves and anything else, but until you put the mic on a stand in your environment and record your guitar, voice, or hurdy-gurdy, whatever, and do the same thing with every possible mic, you won't know what is "best" - and then that will be determined by your ears, which, with all due respect, may not be the best. (I know mine aren't!)
These are all good mics. I've heard good things about the NT-1, and am not familiar with the AT, but I am a fan of their stuff, in general (have 2 SDCs). I own the C214, and for probably 5 years it was my only LDC. Still my primary mic for acoustic guitar, but for my voice I've got the Miktek mk300 (not on your list) on the stand. It just makes my life easier, and I feel like it's a bit smoother for male vocals in general, but I haven't had any female singers use it yet.
And, in the end, as has been pointed out before, good mics can usually return good results on any source, but what it comes down to is how much work is entailed getting those results, and some mics just work better (i.e., making mixing easier) than others on different sources. I can't say whether any of these would work better for you than the other. They might all be exactly the same, or you might think the C214 is horrible on your acoustic guitar tracks. You pays your money; you takes your chances...
