I am also looking for a case for my ally - I have gone through 2 of those "rubberized" cases in the last 3 months.  Or I should say specifically the top cover bit the dust.  Same thing happened twice.  I slide out to use the keyboard ALOT and I am sure that put wear & tear on the top cover.  the back stays on just fine.

I don't need a holster, as I generally have it in my purse, or if I am in a hurry slide it into my jeans pocket.

So any other "specific" suggestions???