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If you're considering a larger set up for a corn, I would probably go with a Townhouse style, which would be more than sufficient for 1 corn in each townhouse (left and right side of the unit). Or if you so chose, you could remove the divider and have one 48" unit. But I think that would be a bit of overkill, unless you're really into showing off the space. Just remember that the more ornate you make your display; the more individual items, as well as surface area, that you have to clean on a regular basis.
1.5x heat in the center of one of these units with a good thermostat should be adequate (so you could heat two seperate townhouses if needed).