Rich mentioned the Swissvax waxes earlier, and having gone from Megs liquid wax to Dodo Juice to Swissvax Zuffenhousen, I can honestly say it's really worth the extra dosh. One coat is all my car has seen so far, and a quick wash + Red Mist has it looking stunning again.
Really impressive stuff, if you're into your car cleaning then I'd say it's well worth investing in a pot. After all, it's only the price of a tank and a half of fuel these days.