I should probably add some more information.
I play Flight Simulator X, which currently uses about 55GB of space on my SSD, and is growing. I really don't want to move it to an HDD because the performance increase with having it on an SSD is huge. Therefore my two options would be 1) RAID my SSD with another identical one or 2) Move Flight Simulator to another SSD.
And yes, I've moved my page file to the HDD.