Hi Alex,
There should not be any particular issues with what you want to do. Audio sample rates and video frame rates really have no relation at all with one another. The sync issues people run into are usually due to manipulation mistakes and settings mismatches. You look pretty set.
The one thing you should check before importing any audio into FCP is that the video framerate in the selected easy setup is the one you'll be editing at. No matter what your sequence settings may be, FCP checks the framerate of the easy setup and will pull-down if it doesn't match the sequence. That one gets a lot of people into trouble. You may need to go check your audio output device settings in the Audio Midi Setup in Utilities if you get playback problems. Aside from that, all should work fine.
IHTH
JC Boulay
Technical Director
Audio Z
Montreal, Canada
http://www.audioz.com
