Does anyone have experience with both of these cases? I am looking at a couple and the E52 looks like the one I will buy based on cost (used $165 shipped vs used E55 $210 shipped), but I'm curious if the 3 liter, $45 difference is all there is to it. I want to assume the build quality is the same, but if anyone has $0.02, it'd be much appreciated. Thanks!
Can't speak for the E52 but having an E55 for almost 4 years now, it really is a great case. I pretty much abuse it every time I commute to work, as the back pack I put into it weighs at or above the specified limit! ~30lbs. I cram as much stuff into it as I can, but try not to get the weight too high, so it's mostly packed with stuff that is light yet large. I also use it for touring and two up riding, which my wife appreciates the added back pad, so we never ride together without it now. As far as storage, I can get two full face helmets and a few other "soft" items, light jackets, gloves, stuff like this and it all fits no problem. Whenever this case gives up the ghost, I will be replacing it with the same, if not it's replacement model.