Yeah, they do stick out a bit on a shelf compared to regular keepcases, but I'm more annoyed by the way they sometimes snag on one another on the shelf, if two snapper cases are next to one another, and you end up taking both down when you're reaching for one or even damaging one.
I can see that being a reason to upgrade; personally, I'm saving my money for all my non-anamorphic crap and full screen DVDs (in terms of upgrading priority).
I have A Time to Kill in a snapper case version, as well. What's even more annoying is that, like Sleepers, it's one of those Warner DVDs you have to flip over to continue the film...