I have been having issues with my wifi dropping when I go upstairs in my home. I was told I need to upgrade the router, but am at a loss on what to look for as far as N, AC, or what is considered the "best bang for your buck." I mostly use internet upstairs on my smart tv or downstairs on my laptop. The biggest issue comes when trying to stream movies upstairs. As I said, I am completely a a loss when it comes to the jargon, but really need this fixed. Thanks!