I also bought the discbox which comes with both the vinyl and CD versions.
The vinyl that comes in the discbox is EXCELLENT! It comes on 2 45rpm discs that really break the mold of new pop/rock albums sounding like crap.
I believe the retail version will be on a single 33rpm disc, and haven't heard yet if this version sounds as good as the discbox copy.
Fantastic album either way! :)