Looking around on Amazon, I found the following holster cases -

Puregear this looks nice and looks like it wont add a lot of bulk, but I am not too sure this will provide adequate protection. Has just 1 review on Amazon. Has anybody used this here?

The following cases have great reviews, but looks to me like they are the same case with just different branding - MINITURTLE, E-LV & i-Blason. And they do look bulky and kind of Transformer-ish looking.

Also, since none of these cases have a built in screen protector as opposed to the OtterBox. Does anyone have any thoughts on how regular screen protectors protect from scratches and drops on the screen ?