Meguires on the outside....
go to www.mequires.com and hunt down their online car protection guide... it asks you a heap of questions about where you live, what your cars exposed to, and (essentially) how much you care about your car.... adn then puts together a program for you based on your answers.... (not all the products listed are easily available here unfortunately, but with a bit of hunting, you should be able to get them, or something very similar)
On the inside, i don;t use much except for the armourall 'new car' cleaner.... similar to normal armour all, only with a lemon scent...