I personally use the Shure SM58, which costs around 100 bucks, and it is great. It has a cardioid pattern and it's dynamic, making it perfect for recording what's in front of the mic and less background noise. It has a built-in pop filter and it is extremely robust. (There are videos of it being run over with a truck and still working afterwards.) If you buy one you'll need a XLR to USB Interface, both as adapter and to amplify the signal. If you want it easy, get the X2U Interface from Shure, it's been designed to be easy to plug in and use. The X2U costs around 120 bucks.
Also, there is a YouTube Channel named Podcastage. There are loads of very good mic reviews on there, I also had a look at those before I bought my SM58.