Im fine with what I have EXCEPT that center speaker. Do folks disconnect or cover it with something. I'm leary about disconnecting it due to an amp being harmed powering an open circuit.
The Focal integration series isn’t too bad. Can be found on eBay for pretty reasonable prices. Plus you can use the factory amp. Things don’t get expensive until you try to amplify the component speakers while retaining all of your vehicles stock functionality.
Currently in the process of upgrading the B&O “sub” from the 8 speaker system. For me it’s going to be an expensive endeavor but that’s because I want full range and a stealth install.