After detailing afew cars and a Range Rover Sport (my boss car) I used the yellow carnauba Meguires in the tan bottles
(the tan bottles are the high end product), with good results. Another thing you may want to consider is using as glaze before the final wax as glaze will "feed" the paint and give it more depth.
RaceGlaze.... The street Rodders Natioanals they have each year in Louisville.... You see alot of them using the stuff...On some very expensive cars...
In general, sealants will last longer and give more protection than a carnuba wax. The best protection is frequent washing to remove the contaminants that attack the finish. You may want to look at the Duragloss line. I've gotten very good results from the 101 product for my daily driver.
gold class isn't a bad over the shelfer, i prefer it over nxt 2.0.
If you are buying online, i really like poorboy's carnuba(natty's paste wax is what they call it), get the red if you can. Easy to apply, easy to remove. Lasts a decent amount of time for a carnuba.
I have tried the collinite 476 but it is very finicky on application/removal. If you don't apply it in the right weather or the right amount(ie: thin coats) it will be very difficult to remove.