Hedgehogs need better ventilation than an aquarium can offer. In my personal opion the large my first pet home cage is too small, the cage I have for my hegdgehog is 11 inches longer than that one and I feel as though there is barely enough room.
I have I believe six fleece liners and I would neer have any less, thinking I should make more as I change them every two days. What kind of liners are you looking into?
Also mine always has a snuggle sack, I own ALOT of those as mine likes to scratch so I am constantl repairing them. Hedgehogs are burrowing creatures, so they should have somewhere they can "burrow" at all times. It also helps to keep them warm.
As far as wheels go I originally purchased a flying saucer wheel and I regret it greatly, I should have taken the time and spent a bit more off the bat and bought a carolina storm wheel. Larry sells those in the classifieds setion of the forum. I am currently waiting for the wheel to arrive from Larry (I live in Canada and only ordered two days ago), what a waste of money the flying saucer wheel was. Conventinal bucket style wheels from a pet store are not suitable for a hedgehog for several reasons, depending on the wheel.
Food I'm struggling with myself but most "hedgehog" branded food could actually be considered really crappy cat food as when you look at the ingredient list they are almost the same. There are food threads on here listing high quality cat food, try have a mix of atleast two different foods as they are such picky eaters that if for some reason the formula changed/ you can't get it whatever you need something else he will eat. Since they are insectivores give insects (some are better than others and there are places that break that down), fruit and veggies are good to add as well.
Here is a list to start you off
http://hedgehogcentral.com/forums/viewtopic.php?f=6&t=3974&start=0&st=0&sk=t&sd=a&hilit=Cilantro
