Hi I just got one pair of mission m71 for front and m7c1 for center and I am looking for rear speakers, my first choice of course is m7ds. My bed room is not that big. I am thinking of whether to get a pair of m70 for rear or the m7ds? And one of the local Canadian dealer got a factory refurbished m7ds for nearly half price. You know it is expensive to buy speakers and stuffs made by other country. Should I go for it? Or should I just get a new m70 which are the same price! Is it bad to get refurbished speakers? Thank you for your help guys!