Your monitor takes up far more power than your computer........ If you really wanna save money, don't use your screensaver, just power off the monitor
I leave my computer running 24/7. But I turn the monitor off at nighttime.
Since I am not the only one living here, I am not gonna TRY my hardest to save engergy, because the others don't.... the less I use then they compensate by using more.
Your TV takes just as much power as your Tower, and most of the time a little more...
So many things take power, cutting out a few of them is not gonna save much $. It prob costs you 1 extra dollor a month to leave your computer and monitor running the entire month. So turn monitor off and save .50
Just my look on the matter
BTW I don't think its hard on computers to be run 24/7. We are not talking mechanicle moving parts here that wear out. (besides HD and PSU & fan)