Hi. My question is actually two questions. First, if you are looking for speakers to use in a 6.1 setup, would a center channel speaker be ideal or would a single bookshelf serve the system better? Do either of these choices offer any benefit over the other? Second, what do you guys feel is better, a 6.1 setup or a 7.1?? I know most people think, "the more speakers the better the sound," but I was wondering if anyone had any preference based on their past experience. Does a 7.1 setup offer THAT much more sonic benefit over a 6.1? And is it really worth the extra $$ to purchase a 7.1 receiver over a 6.1?? Any help would be appreciated. Thanks.