For the past years I've been lugging around two dominion boxes packed full of cards (and more recently also an extra container for all the mats and tokens). Total weight was about 24 lbs, which was a bit of strain when going to friends' apartments on upper floors. With adding in some fan expansions and Nocturne just around the corner I needed to upgrade my storage so I could fit everything.
I may have overdone it a bit, but so far it seems to be working well.
Old solution:
New solution:
In theory this new solution has space to hold about twice as much as the previous solution. It's all solid red oak, with the dominion card back laser engraved into the lid. Given its size and weight I put the legs on it so it could be next to a table and not need to take up any playing space. Can't wait to add Nocturne to the collection!