Hello Shady. I am hoping for your opinion reference my goals. I will be using my system for 60% HT vs 40% multi channel Audio. Under 3000 Sq ft room. My typical listening level is +5 to reference. I am looking for a chest slam and TR, and realize I will be making a compromise of both because of my preference. System will consist of 5 Klipsch rp 8000's and 4 wall mounted Atmos speakers overhead. Subs I am considering, 2 of which will be used in my system, are the paradigm X15 vs the Mono M15. Subs that are bullet proof to over driving is an important feature to me, since I have damaged previous subs while being stupid in the past. I just don't want to worry about that. I consider the room correction ability of the X 15's an important option. I am not looking at spending much more than $1500.00 each on a subwoofer.