I will start off with what we have first.A 60 in Vizio TV.The TV is mounted on a wall.The room demensions are 30 ft by 30 ft with an 8 ft ceiling.This room is a gathering area/classroom.We are on a tight budget and would like to buy componets as needed or when money allows.Reciever that could handle the following.The system will be used 30% of the time for movies 40% of the time for educational clips and 30% of the time just as a PA.I was thinking bookshelf speakers on the front add subwoofer and centering speaker later and something for the rear.Any suggestions or help would greatly be apprciated.I will answer any questions as I am sure I am leaving something out.Thanks in advance