I looked over the choices, and it appears that you have three - one is listed as Bendix (but showing ACEI as the manufacturer?) for $96, one (with a different part number) with ACEI as the manufacturer for $90, and the ATE unit for $225.

I have used the ATE "Power Discs" (front brake rotors) when I upgraded the brakes in my BMW 535i (I mounted late model M5 brakes onto my '85), and these worked great. Of course, the upgraded brakes were overkill on that car, so I really can't say if it was the bigger size or the "better" rotors which offered the most increase.

Based upon price, it would imply that the ATE calipers are somewhat better than the other choices. Given that they don't appear different (it's not like they are six piston units), I would investigate if there is actually any difference, and if not I would pick the parts that are closest to (or actually) oem MB.

If ATE is claiming a performance gain with their calipers, it is probably worth investigating (an extra $200 on a repair job is relatively pennies on these cars...)

-David