Short answer: Yes and No.
Right answer: USB microphones are improving all the time. Most of the USB mics designed around a large diaphragm cardioid condenser mic (the vast majority), will do just fine when you are first learning to record your voice. You might like to hear yourself while recording, in which case choose a mic with "zero latency" monitoring (a built in headphone jack). Other people find this distracting and record with headphones off, so that won't matter to them. You can also choose a USB mic preamp like the CEntrance MicPort Pro, which allows you to use any microphone you like, but gives you the same simplicity. 

Last updated on November 3, 2009 by soundgun