Wannabe - You can buy a rebuild kit that has a new rotor in it if you want to fix it for a spare and have a bunch of spare parts.
Fractured - I am running blitz ESE ends. They aren't the strongest, I'm on my second set this year and have also replaced many over the season but they aren't tight and don't pop off easily. I don't mind the black stock caps and am planning to switch back when I run out of ESE caps. They seem to perform as well as the ESE but are stronger.