Hello! I'm considering upgrading my Paradigm PDR-10 subwoofer to an SVS. I have 3 questions before I make my decision. 1. Which SVS model 20-39PC or CS?? I am in the process of moving into a basement home theater room (A contractor is going to be building the room by the new year. I'm using a very odd shaped living room for my theater right now. It has many corners, fireplace, steps to 2nd floor.....I can't wait for the basement to be done!!!) The room should be about 20' by 15' when complete. I listen to movies at a volume less than reference, but still pretty loud. Not sure exactly, but probably 8-10 db lower than reference. I guess I may listen louder in the future. I am using the Paradigm monitor series speakers with a Yamaha RX-V596 receiver if it makes a difference. Will I need the 350 watts of the Samson for my room or will the self-powered sub do fine. Does the Samson amp have auto on-off like the PC? 2. I would like to get the ART 351 EQ (can't afford the Symetrix). Does using an EQ require an off board amp or can I use the EQ with the self powered sub? 3. How important is having the phase control? I know the CS would not have one. Will I miss having one? Thanks for any help!