Archiving Betacam tapes

I am digitizing a few hundred betacam tapes. and i was wondering if anyone had any input on the best way to go about this, and what is the best way to compress them so they are still high quality files. They are all standard definition tapes.

The equipment i currently have is a blackmagic decklink sp card, a raidon storage system, and i have final cut pro right now as my way to capture the tapes.

any advice or recommendations on new equipment would be greatly appreciated

thanks
Nick