I'm probably asking a question that's been asked 1000 times here but....I have RCN internet 25Mbs with the standard Docsis Cable Modem and router. Placed them in a central spot in my home but still can't get a good signal in the room furthest away. Thinking I may need a more powerful wireless modem or router or whatever but don't want to spend a few hundred on one. What are my best options?