the "Not recommended for pets that like to chew" bit is a bit of a red flag, heh. it's also very narrow... and awfully expensive for what it is. you mention an x-pen not working because you have a dog... it's worth mentioning that rabbits need either at least 4-5h outside their cage/roaming the house on a daily basis or an enclosure that's a *minimum* of 60 square feet. the less time your rabbit gets out of the cage (ie if it's just for 4-5h vs being out most of the day), the bigger the cage should be - for a rabbit that's not *primarily* free range, I definitely wouldn't go with a cage that's only 23'' deep.
if you don't mind me asking, why don't you want a NIC cage? you were looking at a pre-made NIC condo before... a NIC cage is by far the best thing you could have for your bunny, given that x-pens have been ruled out.