Paradigm or JL subwoofer

That’s what I was told in a showroom, that the JL’s go way deeper than the Paradigm.

It shouldn’t be hard to find specs or measurements online to see if that’s true.

JL subs are costly and solid physically. But still, the sound of any sub will depend on good setup. I have had two JL F112 for 14 years. Between them, they have been back to JL four times for repairs (not four times each). The last time, to JL’s credit, they looked at the history and did the repair for free. The F112s sound great in my system. They should -- I’ve spent hours positioning them and fine-tuning the DSP crossovers and PEQ (in my Anthem stereo preamp) I use to get the bass flat at the listening position.

Regarding PEQ in a sub: It can help, but it works only up to the crossover frequency, of course. The Schroeder frequency typically is one or two octaves above that, and room effects can be important for an octave more. So sub PEQ is a partial solution.

I agree with the comment by @james633 --

Sub integration is far more important then the sub itself. I would use the “saved” money for a highpass crossover. It will do more for you than any sub or system upgrade. The JL C-R1 is a good option and Bryston 10b-sub is another.

Good luck!

thanks for the response. I have decided to buy another Paradigm SW1000. Too many comments about the reliability of the JL's has convinced me. I probably don't need to spend $3000 on a second sub but I would worry that mixing subs would not be as good as two the same

Good call to stick with what you have. You will be happy with that. 
Each time my JL E112s broke they changed out all of the electronics. This last time they change everything (including the driver) but the box. I basically had 4 subs fail. My current two have been going strong for about two months…. Fingers crossed. 

This is for Home Theater? 

Paradigm SW1000's, JL Audio F 112's?  One "sounded far better," where? Your room or mine? That Paradigm margin is quite attractive, eh? 

After first hand experience with the F series and Paradigm, I wouldn't choose either. Not for their lack of quality performance but for their stunningly limited low frequency processing design.

I'd suggest auditioning a dealers JLAudio F series at home with your current sub. They both have XLR in/out. Check first but I believe you could use either's processing to run both. and make an informed processing decision yourself.
Their subwoofers, they don't need to match. 

In the end JL's CR-1 crossover may be your best investment.

@james633 Does JL use silicone calking over their boards?   

Not sure about the silicone caulking. The local shop did all my repairs.