Best Subwoofer you've ever heard???

I don't know if this thread was ever made. I am a serious bass fein and have owned three subwoofers. My first was a Paradigm Servo 15, then a M&K MX-350 MKii, presently a SVS PB13 Ultra. As time went on the bass obviousely got better & better as I went on.

I think with my set-up and tweeks( Hifi Pyon Mythology sub platform) I have well defined, acurate, deep & solidly controlled bass. I am curious if I or anyone can help with advances in another subwoofer and explain they're experiences with all with either home theater or music. Myself, I am 65(movies)/35(music).....

Regards Bacardi