Very cool that you have a Sept trip (even if you're driving yourself nuts with last minute planning - it's so worth it! LOL)!
I was playing around on the DisneyWorld website and from what I can tell, you should be able to purchase both types of tix online and you can pick them up via Will Call at your resort or in the parks.
Val, Co-CL Disney Vacations
Oh how fun! I love to plan a trip, no matter if I have 2 weeks or 2 years. :) Sounds like you will have a wonderful time and I hope you can get your hubby to see the value of a moderate (I struggle with that myself ;).