Looking for a musical subwoofer @ $500>


Had some thoughts, but figured I would ask here as I was given some great advice for my previous amp/preamp questions: https://forum.audiogon.com/discussions/amp-preamp-or-avr-for-home-stereo-and-entertainment

System sounds great btw! Parasound A23, Integra 80.3, KEF Carina II's, Technics turn table, and a Blu Ray Player. 

Anyhoo - I could use some more bass. The KEFs get down to 55hz but a lot of my music goes lower and I don't want to compromise... to a point. 

Looking for a sub capable up 25-30hz on the low end with anywhere from 8-12" driver for less that $500. I came across the Klipsch R-12SW and the reviews were stellar, especially for the price. Want this for music more than Home Theater, but both would be nice. I've even read that the Pioneer SW-8 or 10 is a fine unit for the price. 
I know of names like Sunfire and Velodyne, but I wonder if it's worth buying into those companies if I can only afford the lower end products.

Also, my guess is that buying a used subwoofer is like buying a used race car... expect it to be driven, hard. 

Thanks in advance!
128x128samgoldenberg
" I’m going to call SVS in a moment, but in all likelihood they will want to sell me an SVS sub, so, with that in mind, any final thoughts? "
What do you think they would try to sell you??
Well, yeah, I realize that, donvito101. I had some questions and they answered them. I also called Crutchfield and had a chat. Went with the SVS, go figure. They had one available for $450 (open box, brand new otherwise), so I got an Audioquest cable, too and still came in under $500. That'll do!

Thanks y'all
RELs are brilliantly designed, sound great, and use your main amp for the signal (the "High Level" input...so they arguably sound like your amp).  I own 2 from the same era…a Q150e 10" 150 watt, and a Q108 MK2 100 watt. Both were bought used for around 200 bucks each and work perfectly, and feature adjustments for level, phase, crossover points, etc., that many other brands don't have. They're known for their "musicality" and having had mine for a while used with various power amps, I can say they're an indispensable part of what is the best sounding rig I've owned in over 50 years. Be patient and look around for one of these as you can't go wrong with 'em.
I like Rel subs. You want a fast sub maybe with a servo amp. I used to have SVS but the customer service was not that great when I wanted to fix it. I think Rythmik subs are very good as well, with fast amps built in (thinking F12g).
My two cents...