NEED FEED BACK ON M35 Sound System Upgrade

[Suazo]

So i am trying to upgrade my sound system, was wondering if any M35 drivers were able to install 8inch speakers on the door. I was told that it was possible, i am looking to upgrade to either 8inch Beyma Speakers on door panels, 10 inch speaker at rear deck or maybe a 12inch if it fits, and a subzero L7 12inch Solo Baric Subwoofer with Hifonic Brutus Amp for bass and JL amp for voice. I would like to know if i can fit these 8inch beyma speaker or should i go with 6.5" speakers?????