I have had different versions of Verity Speakers for years as my main speakers. My current main speakers are SarastroII's. When I purchased the subs I had Parsiful Encore.
I have had Aerial Acoustics Model SW12, it is fast and very nice sounding sub you can adjust volume and other settings with the remote it comes with also has LFE input. Ended up being just too large to have 2 in the front of the room.
Next 2 Rel StadiumIII's, size is large but could work with and again very nice sub also has LFE input. Was not fast enough for 2 channel IMO.
Now I have 2 JL Audio f113's, small footprint very very fast, easy to setup for 2 channel but had to add a crossover for LFE input. The best sounding sub for me to date.
I crossover at 35HZ as the front speakers have 11" woofers and do not need much help in 2 channel but they do load the room and are great for movies. I still have 1 of the Rel's and use it as a rear sub for movies.