Glenn,
A couple of things to be aware of as far as what you are getting....
To get the directv HD programing you need a 5 LNB dish - and probably a reciever box that can take 5 inputs.....
Local Channels - Normally you have to subscribe to local programing in a "home" area. Heard they might be making changes to accomodate full time travellers or the tech might be able to tell you how to get around the system.
Don't know if you are interested in DirectWay for your internet access. Seems to me your current system works fine but you can ask questions about it and if what they are giving you is compatable if you decide to add that service in the future (or do you need to replace everything?) One of the two (I am not sure which) requires a completely seperate dish so it may be a mute point but at least you will know the details if you ask, then we can all pick your brain in the future....