Thinking of SPG being my next card (but many months away) for the same reasons. Mine would back date to '94, and we do the Disney thing often...building toward stays at the Swan or Dolphin on site would be nice. Currently, I use my CSP for travel purchases.
For now I have quelled my app bug, but thinking SPG will be my next card, too.
Glad you posted the question!
I can't quote either. ;-)
But read this link. It's very informative on this matter:
Hey thanks for the info guys and thanks for that link. These reward programs are so hard to follow. SPG deals with like 29 airlines while MR is 17 and UR is less.
I guess ill just stick with chase and amex UR and MR. I just wanted to get an amex revolver so I can backdate.