Hi everyone

Just joined the forum. I am almost done with our home theater room. The dimensions of the room are 14.5 feet by 17 feet with 7 foot ceilings.will I be ok with one horizon center speaker and use the sierra 2's for the mains and rear surrounds? Also, what sub do you recommend? I will be using this set- up for 50 percent music and 50 percent ht.