Don't spend that much on rears!!
Plus if you save on the rears you can get the 165KRX2.. The focal solid amps are good, but you may want to find an amp with a bit more grunt as the new focals are 2ohm and therefor you can't bridge the channels. I've got a Boston amp running my K2P's and it gives them 175WRMS a channel, if i had the 2Ohm versions i would be getting 300WRMS a side!!!