I currently have a pb1000 & am looking to either add a 2nd pb1000 or return my current pb1000 for a single sb3000. I read many good things about the sb3000 but wondering if a 2nd pb1000 would be a good upgrade? I have never owned a sealed sub. My room is 12 x 18 & music to movies is about 50/50. This setup is in my living room with 1 or 2 seating positions. I am quite impressed with my pb1000 but am very interested to see if it can be better. I welcome all opinions.