I didn't even realize they re-did all the old Futurama volumes to match the new designs that started with Vol 5. I watched the show through Netflix and loved it, but at this price I may have to bite
My OCD is annoyed, slightly. South Park (and several other shows) changed up their casing a couple of years back too going from cardboard cases to slimmer plastic packs and re-releasing everything in the thinner cases. Then of course Blu-ray releases makes you wonder "Why bother with DVD at all?" And then its like - Do I really want to own this physically as long as its streaming on something like Netflix?
I love the new designs so much, I already have all the volumes. The redesign just came out a couple weeks ago I think. I suggest buying them, they have commentary for EVERY episode, and sometimes they are even funnier than the episodes. They make fun of Fox and talk about which "finale" episode is everyone's favorites. Make fun of writers with degrees in writing and English, loads of fun.
Did the earlier releases of Vol 1-4 not have commentary? I don't know that I ever checked on mine. Amazon seems to indicate the older versions have commentary.