This gets brought up a lot (for $600...).

This goes for not just C4, but any of these types of systems. You HAVE to factor in the cost of the network as well if it is not already in place. Yes, $600 is a great price point and comparitively, will still be lower then the competition when factoring in the network for all of them, but the number is most like $1000 or more when you add a decent network. OF course, this is assuming you will use the remote for more than just a basic control. If that is all you are using it for, then you can get in for less than $600 and do everything you want.