Add SVS PB10 and PB1 on top of your list, they'll play down to 20hz and even high teens in room, with a decent sub you can actually feel the bass instead of just hearing it. Take a hard look at Rocket UFW-10, it's a piece of art and very musical as well. HSU, Outlaw, they too made great subs. As much as I love my M22ti, I hate to say this but I can NOT recommend any Axiom subs, you can get better and more with other brands.