anyone know anything about air suspension on newer impala?

Hey guys Im looking into getting an 06+ impala and I had a few questions about putting air suspension on it. First is what is the difference between previous years and the 06+ impalas suspensions. Would kits from previous years work on the newer models?

I found this kit which is the air struts and it says they fit 00-06 impalas

http://store.streetbeatcustoms.com/ezs75629-d3.html
http://store.streetbeatcustoms.com/ezs75629-d3.html

I found something on another site that had a kit relocating the shocks for air suspension. Do you need to keep the shocks and relocate them when you go to air?

Also on airbagit.com I found a good looking kit that comes with everything for around 1500 but it says it fits 96-06 impalas. This strikes me a little weird as I wouldn''t think suspension parts for a 96 impala would fit an 06. But then again I don''t know much about impalas so someone let me know whats up with that.

http://airbagit.com/advanced_search_...1&inc_subcat=1

And one last question is there a difference between 06 impalas and 07+ impala suspensions? All the kits ive seen only go up to 06 impalas but say nothing for 07+. Whats up with that?

The more answers and info I can get the better, thanks anyone.