This is my first foray into Amex territory, so I need some orientation regarding a dizzying variety of names I encounter. I mean, in most schemes I can guess that gold is higher than silver, but that doesn't tell me about where centurian fits. Hence my basic question: What is the hierarchy amongst Amex cards, and which ones are particularly good for frequent flyer purposes? My general goals will be to open two accounts (wife and myself), get as many bonuses as often as possible, be able to move points between the two accounts, and convert to airline tickets or hotel stays when needed. Another basic question: Do you convert Amex points to airline miles and then buy award at the airline? OR, Does Amex buy/reimburse you for the ticket? Thanks.