I'm just about to buy a PC, and I really need some help/advice as regards sorting out the wi-fi connection. I'm not that knowledgeable about computers anymore, so I was wondering:

* Could someone recommend me a good router to get?

* Do I need to buy the little antenna thing that screws into the back of the PC? If so, what is a good one to get?

* Will I need to buy anything else to set up the wi-fi connection?

Sorry for the probably obvious/simple questions.
Thanks v much.