Thought I'd give a review of the Belt Case/Holster I use for my Epic. I've never been a fan of the cases that stay on the phone. Had one on my Diamond and it was always getting dust and lent trapped along the edges between the screen.
I also like the look and feel of just the naked phone with a nearly invisible screen protector.
The Stock horizontal belt cases that came with my Diamond and Touch Pro2 were always getting knocked off my waist. So I found a vertical belt case for my Touch Pro2 made by Cellet from
Top Quality Cell Phone, PDA & Ipod Accessories that worked great and was only $8.00. The only thing I didn't like was that the very top of the phone was uncovered, and it suffered a few nicks from a drop while in the case.
When I got My Epic, I went back to the same website and they had a similar one that had a flap that covered the top of the phone. For $6.99 plus about $3 shipping, this one is well worth it.
The clip has a hook design that is almost impossible to knock off your belt, and stays hooked well on just your pants. The phone fits snugly, but should loosen up a bit as the one for my Pro2 did. You can also get a swivel clip for the case. The clip is removeable if you just want to put the case in a pocket or purse. You can check for notifications without removing the phone as well. The only thing I wish they did was fully cover the phone at the bottom, it has about a 1" gap in the center at the bottom, I assume for charging, but with the Epic you would have to put the phone in upside down to do this.
These are great quality, especially for the price. The one for my TP2 is still in great shape, not 1 loose thread or separated stitching.
Samsung Epic 4G Leather Case Vertical Removable Clip Black
Here are some pics for those interested.