To enhance the incredible color you have, carnauba is a must. Synthetic is good for light colored cars like white, where depth isn't pretty much achieved, even then, an expert in detailing, ahmad_yar @pw suggests that one should treat his white ride at least once a month with a natural wax.
aap ki car to phir aisay zabardast color wali hai, apply carnauba regularly, and see the difference after just one month. your chameleon will become a royal chameleon
coming to why i am stressing on carnauba, the reason which experts mention, is that carnauba usually provides the paint the necessary oils required to enhance it. so it is good every once in a while to treat your car with some natural stuff.
what i would recommend, is that once a month, wash your car with a little less dilute shampoo solution, and prepare the surface using a carnauba wax, like the meguiars you have. then top it with a coat of synthetic, like the NXT you have, then you are good to go
by the way, share some more info about the detailing sessions, what you do now can preserve this beautiful shine of your car until years to come !