NO AQ gets flak because of poor quality control and hit or miss on honoring warranty on broken subs.
I haven't used Z sub, but have got my hands on the softparts and they are very high quality. Z cones are good for a 5K burp, big excursion (abusive) and they'll fail at the surrounds eventually, but if you're not upgrading electrical you should never ever run them that hard unles you do something terribly wrong. Z coils AFAIK are American made and will hold 1200W thermal power forever 1500W for a good while and burp 5K well enough.