IF you're worried about weight, why run the seperate amp?
I love my Sony CDX-GT610UI AM/FM/CD. 4 x 52 watts, controls a ipod from the deck controls, has USB jack on the front panel, built in EQ, controls a sony 10 disk changer, and nice look in a 911 too.
http://reviews.cnet.com/in-dash-car-stereos/sony-cdx-gt610ui/4505-6729_7-32330347.html