You might try to track down 'insite' or find out about the special Brembo rotors (and if they're real or not). That would save you a lot of misc. brake parts and labor hassle. You can also eBay your rear calipers and get almost as much as the new calipers cost.

 

Those rotors might sound like less hassle and inexpensive right now. But later on down the road when it comes time to replace them it’s not like they are a guaranteed production item. Going with the conversion gives you all OE parts. You can go down to any Porsche dealer and they will have Boxster S rotors, pads, and ebrake shoes all in stock. The conversion also make upgrading to other rear set ups a possibility where as with the special item number rotors you are stuck with only that rotor just because the ebrake will not work with anything else. I got new S rear calipers in my choice of color for less then you could have got them for at the wrecker, so problems solved.