I live in a duplex house with my grandparents/landlords next door, we share wireless signal since it makes no sense for both of us to have Internet when we are in good range of the other. This works out fine for everyone else and myself to a certain extent. I have some external USB TP-Link WiFi N receiver that works great for most things including gaming. I have ridiculously low ping due to us having Fibre, but the receiver loses connection to the server or my ping skyrockets when playing BF4. So I want to wire a Ethernet cable from their 2nd floor living room, to my 3rd floor bedroom, to lose this issue and get even better ping and my full 150/30Mbs speeds. Should I use Cat 5E or Cat 6? My guess is about 50' (15m) with no wet areas but cold in the winter. Or are there any other solutions I could consider? I am not looking to spend any more than $40 CAD for this setup and I'm not buying a better WiFi receiver.