Zx1000

I looked around a found that amp, he said RMS = 1000 = 2000 peak. But the new 2008 zx1000 only pushes 500 RMS 1000 Peak, more than twice the price. The 06 is $ 260 for 08 is around $ 400, why are different watts, so what is the best?

power must be the same (it is likely that the site you want to have the wrong specs)
They both RMS @ 2 ohms and 1000watts RMS @ 4 ohm 500Watt and not stable below 2 ohms - the price is different because we're older (like when a car changes year, the price drops more, even they are exactly the same)
Save your money and get the older model

Who does not seem right for it would zx1000 1000rms to 2ohm. But 08 is a better way they are undervalued if it would 1000rms around anyway so I'd go with the new.