Polk MOMO's ****... seriously Polk is highly over-rated. Especially their Sr'sthe polk momo's and the polk amp is a nice combo. the amp is made to run those comps and you can run them straight to the amp without the crossovers.
http://www.polkaudio.com/caraudio/products/amps/4channel/c400_4/
http://www.polkaudio.com/caraudio/products/speakers/6-1-2/mmc6500/
now that i read what you said above this might not be what you are asking but here it is anyway......