New hard drives coming. Update projects now or later?

I want to upgrade to FCP 10.1 (from 10.0.9) at the earliest. I travel and shoot video abroad but return to the US to do major editing. So my current hard drives are small: I have media and backups that I've been moving back and forth between drives. I use three Lacie Little Big Disks (2x1TB 7200rpm; 1x2TB 5400rpm) and a Drobo Mini (2 sets of 4x1TB drives). I've also put all my Camera Archives on a 3TB WD USB 3.0 drive.

I have new desktop drives coming right after Christmas. I am considering upgrading to 10.1 now. I will use Event Manager X to update projects and their associated events one at a time (following the guidance of Philip Hodgetts' article on FCP.co).

My question: Is it advisable to go ahead with the upgrade now and then move libraries to the new drives? (Or would it be better to wait until the new drives arrive?)