You'll find they are all much of a muchness per unit area of screen. A 37" plasma uses more juice than a 28" CRT, but it's bigger. As it happens, judging by the consumption stickers on the back of plasmas, Vieras are not the most efficient plasmas. They use 25% more than their THxxPH commercial equivalent, presumably it's the speakers and tuner. 60" Pioneers will obviously make quite a hit on your energy budget, simply owing to vast size. They are more than 4 times the size of that CRT, and use more than 4 x the electricity.