Amex SPG when transferred in 20k increments gives 25k miles, so 1.25 per $. Have you considered spreading it out for benefits other than straight miles and points and would you use? For example, Hilton diamond status for $40k spend on its card, 10k extra miles on Chase Explorer after $25k annual spend. If that would interest you, then run a search in the CC forum as I know there is a list of those types of cards in response to someone.