For question about the power options, I would personally get a small project-box with hinged door, and a switch/ single plug for each device you have (and a couple spares...). Switches on the front, plugs at the back, and timer(s) inside. This way, each device is controlled independantly, without the need to unplug, and if wired right, turning off timed devices would still leave the timer running, so you don't have to reset.
I haven't built anything like that yet, but intend to within the next few months, when I finish buildng my new tank. I'll post pictures, and an artical for the build, and will probably be willing to build for people who aren't comfortable with DIY electronics.