I recently moved into a new 2BR, which I share with my girlfriend and about 6 PCs and other devices between us. In the complex Xfinity is included with the condo fee, specifically their performance plan - 25 down and 5 up. The router/modem we were given is an ARRIS TG1682G, and performance is variable - sometimes fast, sometimes not, and wireless is flaky on some devices (ethernet has been pretty solid). I'm not paying a monthly fee for the modem because it's a negotiated package, so there aren't cost savings to not using the included. Would I likely see dramatically different speeds on ethernet or wireless with my own network hardware?