I spend about a million dollars a year on my cc mostly due to my business. I currently put all that spend on my Starwood American Express card for hotel stays and transfers miles to other airline programs.

I am a Amex Platinum member so I do enjoy the suite upgrades when they are available. With my 2 young boys growing older, we are looking to travel more internationally. I was just wondering for traveling to Asia (Japan, Korean, China, Taiwan) and Europe, which credit card should I use to maximize my spend.

Starwood Amex will give you extra 5k pts for every 20k points you transfer to an airline. I've traveled to Japan on JAL via business class for as low as 60k miles (not including the extra 15k bonues miles given by Starwood Amex). Also most airline mileage transfers I care about are 1:1 with the notable except of United which is 2:1.

I was thinking to either get a United card or maybe the Barclay Arrival Plus World Elite card which might be better for me for air travel.

Love to get some advice on this. Thanks.