Could someone please point me in the right direction, i have the following equipment set up in my lounge:

Sony Bravia 1080P Full HD LCD TV
PS3
Video DVD combi
Freesat Box

I am looking at getting a Sony Home Cinema kit but i cant find the one that I need. Is it possible for any cinema kits to be hooked up in a way that no matter what you are watching (tv/freesat/ps3/video) i can listen to them all in surround sound?
I previsouly bought the Sony DAV-DZ260 5.1ch DVD Home Cinema System however i could only listen to surround on freesat and had to keep flicking between 'audio system' and 'tv speakers' if i was to watch videos/ps3/tv as i only had the one hdmi socket in the back of this home cinema.

Hope this makes sense. Many thanks in advance