Huge problem most dealers don’t carry lots of subwoofers to listen to. So what the person supposed to do? I’ve seen REL subs all over the place and people seem to be thrilled with them so if I want to sub I would buy that.
If you have main speakers go down to 20 Hz and do a good job with bass why would you wanna deal with a sub. I would advocate a sub for home theater so when the tanks are on the screen you can actually feel them.