You know what is even more important than a good microphone?

A quiet room with low reverberation time.

A 50$ mic in a low reverb room sounds better than a 1000+$ mic in a really bad room with echo.

How to lower reverberation time? The room should have a lot of fabric (curtains, a rug), avoid flat surfaces (glass, windows, tiles), don't sit in the corner. Of course you can buy acoustic panels, but sitting in front of a bookshelf should do the job. The different sized books will scatter and absorb frequencies quite well.