Hi Guys, Im currently using some Bowers & Wilkins 684 Floorstanders with some van damme 2x2.5mm speaker cable. I was originally using some bookshelf 685's but now wanting to use them as my rears. My question is, am i ok to use for instance some QED speaker cable for the rears or would i need to use the same cables as per the fronts? How would this affect the setup? Thanks guys.