editing footage shot on digibeta in FCP - file format help?

i am about to edit a 20 minute training video using FCP 5.
the footage was shot on digibeta, of which there is about 120 minutes worth of rushes.

my intention is to edit the piece and author the dvd using dvd studio pro all in the one computer.

i was going to hire a firewire tape deck to ingest all the footage into my computer via firewire, but posts on this site have led me to understand that this will cause a compression to DV. (How bad is DV compression? - is it ever used on tv for example?)
i now plan to get the footage ingested at a duplication house.

can anyone suggest a good quality format to work with and then render for the final product. the training video is not for broadcast and will only be watched on tv screens.

Is working with uncompressed digibeta footage (10bit 4:2:2) in FCP 5 a bad idea without a RAID array?

thanks to everyone
from alex (relative newbie)

mac pro
2xquadcore 2.4
10 Gb ram