To log and transfer from the EX1 to FCP, you need a plug-in from Sony. I’m sure it’s the same for the EX3. It should be easy to find with a Google search.
Also, make sure you don’t rename the BPAV folders.
I’d never shot in sp1080p24, but thought I’d try it today because I had to shoot a long, non-stop event and thought it would fill up the memory cards less quickly.