You have a lot of reading to do or put your faith in Nick
@Nick@GotExhaust he won’t steer your wrong. Although I highly suggest doing a lot of your own research first as there is a lot to learn. For example the BDS 4” kit can easily be converted to the 6” kit and vise versa. Zone and BDS are the same (BDS is higher end finishes and they include stainless brake lines etc.)
King and icon are on a different platform and not considered lift kits. Once you purchase a BDS or Zone lift kit you can order custom length kings or icons to get the best of both worlds, but that goes back to you needing to do your own research. “The Best” is very opinionated because there are multiple ways to achieve. That’s the same as asking what the best car is you’ll get answers like Rolls Royce, McLaren, Lamborghini, Koenigsegg etc. etc. etc. are any of them wrong?