Yeah, everyone is scared of the brakes, but nobody seems to actually have any problems with the electro-magic braking system. Besides, it's under extended warranty.

Regarding E55 vs E63, it's a price thing. Here in Dallas we are seeing nice 2005 E55s in the very low 30s. Don't see so many E63 cars, but a quick look at ebay shows them just a hair below 50. It's a whole lot more money.

I've driven the E55 years ago, but not an E63. I'd have to try both to say which I like better, but the big torque curve on the supercharged engine is appealing. My friend at the local MB dealer says the E55 is a lot stronger from idle to 5000RPM, but the E63 pulls harder at high RPM. So the E63 posts better numbers, but the E55 is quicker and more useful in everyday driving. Pick your poison, I guess.