It's a dynamic mic, so just buy a 1/4 inch to 3.5mm converter and plug it into your computer's mic slot.
I work in a store and usually sell people a Shure PG58.. they seem happy enough
A Shure PG58 can be purchased online from many music equipment specialist suppliers and also from the online retailer Amazon. They can also be found for sale on eBay.
The best speakers are the ones that suits you best. To choose speakers, you need to consider the area of your room and the effect you wish to have. You may visit unify company, they have many designs about that.