I can upload and download files on my desktop over wired, while streaming Netflix over wireless through a wall with absolutely no problem at all.
These things won't help my ping at all either. My ping is because of my ISP, not my network equipment.
Invest ~$150 into a NIC, or invest $150 into a highend router? I settled for the router with no second though.
On a low budget build, these make absolutely no sense at all. On a high budget build, between multiple GPU's, sound card etc., do you have the room to put a killer NIC in without killing airflow to something important?