If i remember correctly, PE said that the 05 is a higher "performer" than the Etek. In essence, the two guns will shoot exaclty the same and perform on the same level as well. The 05 just has some more "high end" features, the main thing being the LCD screen and QEV's. Personally i would rather buy new than used and this is why i would rather buy a new Etek over a used 05. Then again though, you can find used 05's with a star frame and many other upgrades for the same price as a new Etek. You make the choice, both will shoot the same basically.
Some scientists claim that hydrogen, because it is so plentiful, is the basic building block of the
universe. I dispute that. I say there is more
stupidity than hydrogen, and that is the basic
building block of the universe. - Frank Zappa