The problem with shutting down overnight is that the maintenance routines will not get run, at all. Sleeping takes only slightly more power (<1w) than shutting down. http://www.google.ca/url?sa=t&sourc...MG2UfoTjgW-Ed4tmg&sig2=9tL2xESbkApMOZ5L23EOWA
So change the time of the CRON jobs. Personally I run them as part of my startup. It's not hard to do. Yes it means startup takes longer, but that little bit of power saved means a smaller leccy bill.