Excuse me, but I can by the hardware cheap in the the next 24 hours, and no one there answered my final questionin tomshardware, so I'll try my luck here...

original question: Improving Wifi speed inside the house - General Connectivity

So, Is a thing like the NETGEAR R6400 AC1750 Dual Band Gigabit 1750Mbps will solve my problems, or due I need to replace one of the NIC's with it? If so, is the Linksys Dual-Band Wireless-N USB Adapter (AE3000) suitable?

Thanks !