New Roamio, upgrade drive or set up with original drive first?

New to Tivo, moving from HTPC. Have the cable card. Ordered a refurb Roamio (standard) directly from Tivo (summer sale, including lifetime service) and a Western Digital 3 TB (WD30EURX) drive from Amazon. I was wondering about the best setup sequence. Should I first put in the 3-TB hard drive and cable-card and let the Tivo set up process proceed or put in the cable card, go through the set up with the original drive and then upgrade the hard drive? Thanks for your input!