Don't try to remove the rear rotors with the parking break on.
If the old rotors don't come off easy, a good long strike with a 2 lb ball peen hammer should take them off.
If you get dealer rotors, don't try to remove the dealer coating - it WILL come off, and the shop manual says to leave it on!!
Balo is the only manufacturer that makes rotors the way M-B dealers are made, they are better than the ATE from what I understand.