Duke, NW, ND, USC

What are my odds of getting into any of these? I'd be ecstatic to attend any of them.

You will probably get in to USC. Notre Dame is probably 50/50 since you are in the region. Northwestern is not likely. I know little about Duke.

I'd put your odds of admission at 60% for Notre Dame and USC. Your odds at Northwestern and Duke are probably around 40%. If one of these schools stands out above the others, you may want to apply early decision - ED would greatly improve your odds at Northwestern or Duke.

id say 50/50 for USC and NW and 60 for Duke and ND

You have a fair chance around 40%-50% for each, which is pretty darn good! :)

If you apply early decision to Northwestern, you will have about an 80% chance of getting in.