If you want to go light cash wise the Blue USB is a surprisingly good mic. We've recorded a lot of vocals with it. An example is our current song on the user forum, "Don't Sell It, Don't Give It Away." Since this vocal track was recorded we have mostly used a Rodes NT1 with a Focusrite Scarlett interface but again the Blue is an incredible deal and requires no interface.

About $100 at Amazon.

https://www.amazon.com/Blue-Microphones/b/ref=bl_dp_s_web_2529047011?ie=UTF8&node=2529047011&field-lbr_brands_browse-bin=Blue+Microphones