I loooooove MB Quart components. Had 2 sets components/crossovers in my 325i hooked running off an old Alpine Flex4 and they sounded awesome. Real snappy, and nice and bright.....*much* cleaner than the stock JBL system in the Runner sounds. You wouldn't NEED an amp, but then you don't NEED these speakers either
Get one, you won't regret it.
A friend had a full set of Alpine DDDrives, and they were very nice as well. But IIRC, more expensive than the MB's and not any better.