complete home cinema system

i will shortly be moving into a static caravan,and will treat myself to a complete home cinema system.   this will include tv, blue ray player, a.v reciever,? speakers. and what ever else is required.i have a large colection of music cd,s and dvd,s.that i would still like to play.  my budget will only be about £3000,  but where do i start ,? to avoid disapointment.  the room size will  be about 12 ft x 10 ft.  can anybody give me some advice on what i need to buy to do justice to my films &music, ? without being blown out of the caravan...