I've had my OV in an Otterbox Commuter for over eight months and cant imagine a better case for this phone. With the resiliency of the silicone, the bump protection of the outer hard shell, the excellent screen protector, and the port/button covers keeping out all that moisture and dirt, it would be hard to come up with a more protective design.
I actually did pick up a new
BodyGlove cover for the OV (over the holidays when Radio Shack had 'em on sale for $7), but after comparing it to the Otterbox and thinking it over, I threw the
BodyGlove in a drawer and left the OV in the Commuter case.
As Broncowolf implied above, the Commuter case makes the OV just slightly too bulky to fit in most belt clip holster type cases. I have found however that, if the case is one of those that has the elastic side (or end) panels it will probably work just fine after a few days of use. If the phone can just barely be inserted into the holster (meaning that you almost have to force it into the holster), after a few days of pulling the phone in and out, the elastic will relax enough that the phone ends up fitting just fine.
The first case I had that worked this way was a
Case Logic brand (can't remember the model #) that I had paid about 25 bucks for. It was a horizontal leather (fake) holster with a belt clip and a big magnetic flap closure. The
Case Logic holster worked great until about two months ago when I left it in the den one night and the dog figured it would make a good chew toy. Fortunately, the phone wasn't in it, so the dog got to go on living.
I replaced the holster with a cheap one that I found, on the clearance rack at the local Walmart, for six bucks. It's a
Wireless Genius brand (made in China, of course) and is the same horizontal type design with belt clip, magnetic flap closure, suede lining, and elastic end panels just like the more expensive
Case Logic had been. After being a real tight fit for the first week or so, the OV in the Commuter case now fits it quite well.
From the UPC barcode on the package, I found this link to the
Wireless Genius case on Amazon for $8 with free shipping.
Amazon.com: Wireless Genius Large Universal Horizontal Case with Belt Clip - Black: Electronics
Highly recommended.