Is there any real advantage to having full size towers as back channels (other than a reason to upgrade to larger/better towers)? Since surround sound it pretty much ambient noise, do you really gain anything?
Unless you can get far enough away from the back channels, I wouldn't recommend using towers else they will be highly localizable. If you do mostly multi channel music listening, I suppose that could be a positive, but for movie watching its usually annoying. The back and side channels should offer more of a diffuse soundfield which is hard to achieve using tower speakers.
If you're happy with the sound of your speakers now, leave it as is and perhaps purchase an additional sub to get better bass response for all of your seats.
Otherwise, sell your towers on our classifieds and upgrade when the new EMPs start shipping.
