I have MB Quart 5.25" and want to put them in my front doors (GS300) along with Boston Pro 6.25" in the rear doors. Both are component speaker sets. Should I modify the enclosures like I saw in this thread or will I get good sound from doing your typical install? I also have an Xtant 603 and Image Dynamics subs 10". Can this all be put in my car without changing my head unit? I would change the head Unit if I could find someone here that can make it look as good as the factory does in the dash. Can all this be added to the factory Head Unit? Please let me know

Victor (Orlando Florida)