So you are paying for someone to produce your music. Or you have made plans (the non-dastardly kind) to take over the music industry. Nothing but the best professional-grade microphones can get that done. You see, when you are serious about making a career in the field, you need serious equipment as well.
Do you really need one?
The thing is, while you can easily buy a headset for, say, $29, and that it would record audio just fine, that gear isn't really built for the kind of music that you have in mind. You see, the usual computer headset is perfect for Call of Duty nights or for catching up with a friend via Skype; but if you plan on showing the world what you are capable of, musically-wise, then you should buy equipment that would be able to pick up the sounds and the nuances you create.
The Big Issue: Dynamic vs. Condenser Microphones
So much has been said about microphones and the various types they come in, but these are the two major classifications: dynamic and condenser mics.
Dynamic microphones are flexible and they are usually bought for multi-purpose use. They look rather simple and they do not require phantom power - more commonly known as external power - at all. Those who are new to home recording usually go for these as they aren't as expensive as the other option (condenser mics) and they are hardy. Yes, they can take a beating - literally. The average dynamic mic can withstand getting knocked over without the sound quality getting compromised (although that's not a reason to start hitting your mic every time you can't nail a tune).
They are ideal for recording music from drums or guitar amplifiers and sometimes singing as well. The downside is that it isn't really THAT good for vocals recording, since in the high register, detail reproduction isn't as good as the condenser mic's. All in all, this option is perfect for high volume recordings as in the case of amplifiers and loud musical instruments.
Condenser microphones are the better alternative for those who want stellar vocal detail reproduction. You see, these have to be connected to an external power source or a battery. This results to an audio signal that is stronger, particularly when compared to that of the dynamic mic. These types of mics are also more sensitive, which makes them the best option for vocals.
But such sensitivity is a double edged sword as it has made the mic unsuitable for recording high-volume sounds like those from drums and amplifiers as there will probably result in distortion. The downside? It is not at all that easy on the pocket-book; it is in fact expensive. Plus it is not as durable as the dynamic mic and it all depends on the power source.
So the bottom line is this: you will probably have to buy both. But if you are just starting out and you absolutely have to make a choice, it would be better if you go with what you need more. Dynamic microphones are usually the better choice if you are looking to record drum sounds and guitar sounds; condenser mics are the better choice for vocals.