charge controller and inverter recomendations

My first piece of advice would be to get ready to dig deep into those pockets of yours. If your are planning to seek any government incentives then plan on seeking a licensed electrical contractor because there will be permit(s) and inspection(s).

Something important here is to thoroughly and completely read and understand the specification sheets with any electrical device you are considering. Know there limits and ratings by UL standards. Familiarize yourself with the NEC, in particular Article 690.

http://photovoltaics.sandia.gov/docs/John_Wiles_Code_Corner.htm

The NEC gets "re-furbished" every three years, but the above site will "get your feet wet before the plunge" so to speak.

One thing you did not mention was, region.
Personally, to achieve, what I think you are wanting to achieve, I would install a back-up load center (breaker panel) and move those circuits I wished, from the existing panel to the back-up panel. For example; lights, refrigeration, communications, media, security. You will have to do a load calculation in order to size (spec. sheet) the inverter correctly. The inverter would be fed 120 vac from the existing grid fed panel by way of a dedicated circuit, it would then pass through the inverter to those back-up loads and maintain a charge on the battery. During a "black out," or you could turn that breaker off, the inverter would make 120 vac from the nominal vdc battery and send power only to those loads, not back onto the grid.
One example of the inverter you might be seeking could be the Xantrex 4048.
Oh man! I could go on and on with this stuff! I'll move on to the charge controller.
Again, read and understand those spec. sheets.
With the 1000 watt array you have and knowing you want to expand, you could look at the Out Back MX60. It would allow you to wire your PV modules at a much higher voltage (spec. sheet) while being able to charge at the battery banks nominal voltage.
The spec. sheets can be found at most RE dealers or the manufacturers web sites. Thats about it. Without more specific question, this is all I can tell you.