Do I need to replace the cables to a HTiB system if I am only running them in a small room? More importantly, will I notice a difference if I do? Secondly, will wiring a 20" WEGA with component cables give me any noticeable difference over Composite/S-video?(In what way, bolder brighter colors? or sharper picture?) P.S. If anyone could get a speaker dimension comparison of the Onkyo 650 and the Kenwood 505 systems? I can get them for the same price but I will not have a lot of room in a dorm room.