I'd like to know if you plan on doing the center channel yourself!?!? That seems daunting to me. I can do most projects but that just seems like a lot of work and I worry it might creek and make sounds once I put it back in. I'd absolutely HATE that! Especially knowing I caused it! LOL
My personal taste is to set the bass to 9 and that makes the sub come somewhat alive for most music. The problem is it also makes the door speakers emphasize the mid bass far too much on other music (80-120hz range) and that is no fun either. Then there is my overall dissatisfaction that the system as a whole does not get loud enough while still sounding good. About 30 is as far as I can go without the built in equalization taking over and changing the entire sound output to something akin to a tim can. The addition of a sub is fairly easy and will definitely help with the low end. There will still be the problem for overall loudness past 30 that can not be controlled without dumping a lot of money into the project...which I don't want to do.
2014 SXL, only mods are after market rims due to recall.