Of course there are better subs out there. DDZ, warden, lvl 6 lol.
But seriously I love my AQ's and I think they sound great, it's no SQ woofer but it sounds good to me, what "sounds good" is all user preference. Have you built multiple boxes with the HDC3's and tried them in every scenerio? Or do you just read about them online and how they "dont get low" and dont "sound good"? Lmao