Using the same setup as I have on my previous two LG/Metro phones- Metro gel case (they're well-made and hold up very nicely), Zagg screen protector and Blackberry belt holster. All 3 of my LG phones (see left) are similar in size and fit perfectly in the BB holster. Not sure what brand the holster actually is, I don't think it's OEM BB but I bought it at Best Buy two years ago when I got the Optimus M. After two years of daily service it's still like new.
As Dave said the Metro screen protector is horrible, it's as bad as the gel case is good. I currently have a universal-fit Zagg on the Motion and as soon as they come out with the custom-fit one I'll be replacing it with that. It is on their site as "coming soon".
I've learned from experience that the cheap cases on Ebay and Amazon are hit-or-miss, mostly miss. You get what you pay for, and given the possible consequences of having the phone fall out of a cheap case when it breaks I won't go near them any more.