As per some of the other posts it sounds like "fresh miles" is important. Having just reupped with Sapphire, I am reluctant to immediately hit Chase right away w/ lots of new inquiries - but to get fresh miles on each of my and my wife's account I just ordered a new kids book from the united shopping link via the mileage plus site.. $6.90 for each book w/ shipping included for each of our accounts.

Just a thought as it sounds like people have been deliberating buying miles @ more expense. I don't know how long it'll take the "fresh miles" to post but there isn't really a rush for me. (just hoping the offer will still be around when they post to where I can see the elevated miles offer).