Also--if you're spending money and really want the sound quality better, I advise putting it into a better microphone (built-in ones, especially in laptops, tend to suck). Microphones can get hideously expensive but you can probably get a reasonable condenser microphone (which I think someone told me is what you want for voice work) for ~$100. It's probably worth reading up on voice recording techniques (pop screens to deal with plosives and sibiliants, etc.).