Any decent headunit with a good amount of power should be able to power the speakers unless you went with retardedly power speakers in which case youd need an amp...
but for your drooling pleasure im showing you something too look into with a new headunit...
Humount Bonneville SSEi *and others* Radio Mounts
$65.00 + shipping is not a bad price for something custom and unique like this, couple people on the various forums have discussed them and i thought you might be interested