Here's what I've found that you may like. I tried keeping the price low for ya.
Hifonics BRX640. Usually, Maxxsonics doesn't make stuff CEA-2006 compliant. In this case, these are. You should research this model to make sure though, I like to be assured, I would assume you would too. As long as you don't turn up the gain, you should be able to power all 4 speakers without blowing them.
http://www.sonicelectronix.com/item_...-BRX640.4.html
Kenwood KAC8406. This one will overpower your 4x6's by 25 watts BUT underpower your 6x9's by 10. That is usually not a problem, but don't turn up the gain too high on either or, since you can clip the sound.
http://www.sonicelectronix.com/item_...-KAC-8406.html