I went with Backblaze first because they were highly recommended by LifeHacker. Then I chose Crashplan for my main Linux computer because Backblaze doesn’t do Linux. Crashplan offers a family plan that covers 2-10 computers, but I only need to cover 2 computers (my laptops don’t have anything that needs backing up). Covering two computers on Crashplan is more expensive than doing one computer on Crashplan and one on Backblaze. So the less efficient and more complicated setup is the cheaper one; oh well.