I have this Targus bag
. Same as the second one pictured above.
I won't disagree with the above post that it doesn't have the thickest padding, but the all around padding is pretty significant. the bottom padding feels a bit thicker than the portion that wraps the laptop, but other than the bottom, if you were to drop the bag on it's back, you'd have to thickness of the bag along with the padding of the straps to take the blow. And if you were to drop on the front, there's 6" of bag (the lower half), so does the front need to be very thick?
But the 9100 fits great in this bag, and a 17" could fit, though I suspect it would be a tight fit if there were a 17" XPS and you were trying to put that in there
I was going to get the ME too, but decided I'd get the laptop and go to Comp USA and see which size bags fit the best, and that's how I ended up with the targus.