A little late on this one, I am, but nonetheless, I'll share my experience:
I am a huge fan of the Protecto Packs. To me they are sturdier than the Star Cases when put side by side, plus the PP don't have the triangle hangtag/lip on top that the SC have(makes it nicer if your lining you figures on a wall above ea. other)
Also, the clamshell PP design vs. the 2 piece SC is a huge advantage, as well as I believe the PP are also UV coated (I may be wrong, but they seem to have an ever so slight bluish tint.
I order mine from adkins collectibles, online a cs. of 90 runs about .89/ea. with S&H they come to about $1.06/ea. best case and best buy in my opinion.
As far as Ephant cases-Oscar's Cases are absolutely fantastic-have a few for my vintage carded and cardbacks. Outstanding heavy duty cases-highly reccommend.