I have an insignia 47" TV in a 13 x 17 room where the dialogue is hard to understand frequently. The couch is about 11 feet from the tv. In the past I have has low end brand surround sound systems attached - but tey usually break after a few years and end up in the trash.I am looking for options to improve the quality of the dialog. Do I go with a sound bar or powered studio monitors? If the latter where should they be mounted ?My budget is 500 US for this project - any help would be greatly appreciated !