I use two smaller 4 way surge protected multiblocks for that problem. One for devices that need to be on 24/7 like router and wireless. Two others for the desk tops, with all the peripherals that are attached to each of them. That way when I turn one off it disconnects the power for that desktop and all its attached kit.

I have just ordered this: http://www.oneclickpower.com/store/gbu0 ... SK105.html
£14.20 including shipping

Not as much because I am desperate energy but I don't want to manually turn off my pc speakers all the time. They produce cracking noise every time my fringe turns cooling on/off, very annoying when I am trying to sleep...

I got one of these in the end clicky.

Does the job for £12. Thinking of getting another so I can switch the TV off rather than have it on standby all the time.