Be a little careful with those Zeiss hoods. My 85ZA had the hood on in the reverse position while in a bag, and, at some point, the right kind of pressure actually popped of the metal hood from it's plastic ring. The ring cracked in one place, but I was able to repress it back. Now, every once in a while, it pops off again. I've had the lens for over a year and a half, so who knows what I did exactly to make that happen? Whoops.
As far as UV filters, I've begun to only use them when I think protection is necessary, because I started noticing some sensor reflection issues once I received the A900. When I do use them, I use Heliopan.