I have been experiencing problems with my internet connection that I am not sure comes from the modem or router. The internet goes out almost every month. When I try to download a big file on my laptop, internet shuts down for the whole house. (Even the computer that is connected to the router + modem.) The router is about 4-5 years old. When it is not shutting off completely, downloads are very slow. Thank you! Which router do you recommend?