Hey,
Don't know if anyone has mentioned this but Brando Workshop, best known for their PDA screen protectors, has an aluminum case that looks a lot like the Rhinoskin one. Has neoprene lining, only 1 SD slot, and an actual reset hole on the back! It's a bit cheaper than the Rhino too. I have the Rhino and it's great, else I might consider this one. Btw, I just got delivery of their Ultra Clear screen protector for my X50v and after some struggle managed to get it on w/o any dust, though I did leave a fingerprint on the corner of the adhesive side. But I've had great results w/ the Brando protectors in the past on my Handera. Hopefully this one is just as good.
Ooops, almost forgot. The URL for the case is:
http://shop.brando.com.hk/bwmetalcase_details.php?i=26