Heh- I'd say if you're going to throw out energy conservation as a reason, you should turn off the gaming computer and play some checkers or cards. It's kind of weak to say "Brand X uses 50 less watts! I am saving the Earth!" When you're already totally wasting a a couple hundred watts to play a video game anyway.
That's like me saying "I drive a 5.3l Silverado, but I'm doin' my part for the environment and conserving fossil fuels by keeping my tires fully inflated and a clean air filter in it!".
I'm still getting 14mpg driving around town, so I'm not exactly Joe Ecology.