Researching 3.1 Modems ($200 max) leads me to MANY complaints of Arris products overheating, dropping signal, and other malfunctions. Customer service is questionable as well. Can anyone suggest a brand they own and use that has proven reliable? I've had Motorola, then Arris, for longer than I can remember, and they've all worked properly. My internet speed was recently upgraded, and the trusty Arris 3.0 modem is a bottleneck. I'm all ears...