I'm with your DH, it broke my bloody heart to have to give up on my fish tanks. We moved country though, there was simply no way. DH did mention this week that perhaps we can get an aquarium here though!!! =D
I'd personally never, ever get a fish coffee table. Filters will look horrible in it, you'll have electric cables coming from your table (filters, lights if you want to keep any type of plants in there, heaters) and on top of that it's rather stressing for the fish if you actually use your table. Putting cups down will make a heck of a noise and can make them quite jittery.
I'd also not trust any toddler to not find their way in or throw things in the water with it being so easily accessible.