I currently have an h/k avr630 which I plan to use as a 7 channel set up. I am using some jbl E90 towers in the front I also have a set of infinity entra three's and jbl s38II. my question is what would be more suitable as the rear surrounds the infinity's or jbl's? The jbs being a bookshelf speaker have more flexability for nounting up high but they still weigh a ton for a bookshelf speaker and are not at all invisable. or would it be more logical to place the infinity towers in rear and place the jbs to the side. this setup is in a basement which is about 10-15 feet wide by about 25-30 feet long with only about 7 feet of celing height. any suggestion would be greatly appreciated. also anyone have any suggestions as to where I can get a decent pull down projector screen for cheap??