I've spent a lot of time travelling in Asia, but never done any of the more 'developing' countries. My wife and I would like to spend a couple of days in Singapore (she's never been) then head into Vietnam for about a week. We'll fly into/out of Hanoi as it looks like we can get award flights on Thai, but I don't really know where to start in terms of creating an itinerary. We'd like a mix of cities and "countryside", although countryside could include villages, beach, jungle, whatever. Assume a budget (not including airfare) of about US$400 per day for two, which I suspect goes pretty far in Vietnam. Any suggestions?