I did change my mind when waiting for it and I wanted to get the 12" (and later on buy another one, as there is not really enough room for a decent box for two 15"'s), but the delaer said i can't change my order.
I've got either 1200w rms @ 4 ohm or 2400w rms @ 1 ohm (cause it's a dual 2 ohm version).