I got the Citi Prestige card earlier this year and I love it. The annual fee is $450 but there is a statement credit for airline purchase(including ticket purchase) of $250, so it is essentially a $200 annual fee. The Priority pass that comes with it includes guests and gets you into all the Boardrooms as well as a bunch of other lounges. There is a fourth night free hotel benefit when booked through their travel service that I have used twice so far.

The prestige card earns "thank you points" and whether that is better or worse than miles really depends on how you fly and what you use your points for. If you use your AS miles for international first class then the card earning AS miles is probably better, but if you almost always fly domestically and you have accumulating AS miles because you hate to use them for your flights and miss out on the elite qualifying miles and/or the chance of an upgrade then Thank You points may be more valuable to you. 1 thank you point is worth 1.33 cents when booking any airline ticket except 1.6 cents if it is an American ticket(including American tickets on other airlines). The best part about using Thank you points is that they are paid tickets to the airline and they earn miles and are eligible for upgrades.