Hello -
Have you looked at
ZeroChroma's VarioProtect? It's got a clever design that's received raves. I'm interested in it myself; I'll probably buy it.
The
Scooch Clipstic Pro is also an unusual case, and it might be useful for portrait orientation.
EDIT: I've just discovered that at least some of the newer Clipstic Pros are made of aluminum. You'll want to avoid metal cases, as they interfere with signal reception.
Finally, You might consider
DracoDesign's Tigris Shell Stand Case. It's certainly slim and unobtrusive!
Best regards,
Brian