Pardon, but:
FX1 and Z1U are true High Definition, HDV is just at the lower end of HD, just as DV is at the lower end of SD. And: "Emulation" wrong, HDV does not emulate anything.
The "Cineframe" mode on the Sony cameras (I use a Z1U and love it otherwise) is a joke. You get better results shooting regular and using any of the available "film look" filters.
Also: The original poster asked for 24p to be edited with FCP HD, he did not talk about HD material as far as I can tell...?
In the price class mentioned you look at the Panasonic (DVX100A) and (in some areas of the world it is that cheap by now) Canon XL2. If you want to use FCP for editing your best bet is the Panasonic. I use it a lot and the results are great. It is well-balanced, good manual controls, very robust and reliable, great lens but limited zoom range (at the long end as compared to the Canon XL2), but Century Optics has great wide-angle and tele add-on lenses. You might have a look at www.dvxuser.com to find a lot of information on the DVX and competing products. There have been several reports on severe audio issues with the Canon and FCP.
Cheers,
Uwe