Which is the best PCI card for a PC?

I would like to know some of the best PCI cards for Desktop? I think my Wireless card has some issues. Whenever I try to connect to my home network ( (i. e: BSNL broadband)) there is that error of limited network.

I use TP-LINK modem for the services still there is some issue which I can’t figure out.
I wanted to buy a wireless card which one would you guys recommend.