I was never a fan of those homeplugs, I tired it out in a few different houses, and always had issues. Maybe the new ones are better, but I prefer Wifi over those plugs any day. But if it works for you, then great! Just try it out. Im a way, just for mainly updating the schedules and other feature, Wifi might be overkill. Slingbox should be fine, as your internet line is never gunna get mear 100mbits/sec to actually stream.