Kaufberatung Kickwoofer

Hello dear community, so my 1.3000D I have sold now and my 3800SXT is already as good as gone, now I have the financial means to buy Kickwoofer or to install. I ordered doorboards with 2 16 photos 12 days ago. So front system I install the 165C system from Ground Zero. And now I just wanted to know which Kickwoofers (16ner) + amp are recommended for my Audi Cabrio. My limit is 500€ best would be something up to 350€ What can i r recommend me, because I have only experience with GZ but there is certainly also something else that is a little cheaper and better. Could you suggest something to me, best with link. Thanks for your help greeting Hermann