I enjoy the bennies of the AmEx platinum card. The only downside for you is DL Skyclub access when flying AS domestically. You won't get Skyclub access when flying AS. But other than that, the benefits are good. Besides Priority Pass and Boingo, you also get some hotel status and other bennies like reimbursement of Global Entry fee - read up on the paperwork they send you with the card. You can get up to three additional cardholders for a total of $175 (not $175 each) if you have friends/family who could use it.