I have already got the cp-321 leather case and it is really nice(wish i had the phone to go in it).
I am planning on getting the ZAGG full body protector for it as well. My only concern is some people have reported that it is hard to use a stylus on them.
The durasec ones got horrible reviews i honestly couldn't find a positive one.

There are the 3m made screen protectors sold at protectionfilms24.com but they seem quite expensive and do not come with the applier like the ZAGG protectors.