Along with a good studio quality microphone and audio interface, you need to have a computer that’s quiet enough not to interfere with your recording. Or a way to control your computer remotely, so it can be in a different room than your microphone.
For quality, quiet computers, I recommend two options:
If you want to buy something, plug it in and start working, you’d be hard pressed to do better than a Dell. Their computers are generally very quiet, well built and well supported.
However, if you don’t mind getting more “hands-on” with your computer equipment, then you’ll find lots of interesting ideas at EndPCNoise.com.
Once you have your computer running silently in the background, plug in your audio interface. Connect your microphone. Fire up your audio editor. And you’re in business.