Camera case for Nikon D5100?

I'm looking for a holster style camera case. I want something that will protect my camera. I don't want something with a lot of extra room so that the camera can move around, and nothing so tight that it puts pressure on the camera. Any ideas?

This is my bag and of course it's too large for what you want. But perhaps this company can help.
http://tamrac.com/5606.htm

Tamrac 515.