American Express Membership Rewards - Delta AMEX and savings bonds

Am I correct in assuming that if I purchase savings bonds with my Delta AMEX before the 15th of this month (actually a few days before that to make sure the purchase is posted before the 15th)I will receive the double bonus miles on the Delta promotion and that whatever I charge will count toward the $25K annual spending needed to get 10K base miles with Delta?

Given the current rates, would you advise me to go for EE or I bonds if I were going to a)cash them in in 12 months or b) keep them as a cash reserve for at least 5 years with virtually no chance of needing the reserve in that time?

There have been quite a bit of discussion on this topic in MilesBuzz. Do a search. The answer to your questions are yes and INHO I-bonds, I-bonds.

Thanks, Pierre. I did searches in this thread before my initial post and didn't find exactly what I wanted but it never dawned on me to search MilesBuzz (duh). With a search there I've found everything I need to know about the bonds. I agree that "I" is the way to go. Thanks for pointing me in the right direction.

Just make sure that you do not wait until the last minute to buy the bonds. It takes a few days for the AmEx charge to post. Also, be patient for the double miles to post. It's been taking around 3 months +/-.