Hey, Bryan - I'm with Flapjack, Colin and Whirley
1) Upgrade the wife, and get the Vette and the Reef (or all 3 including flying lessons, if you include Flap's suggestion). If that's not an option, I heard hypnosis works well with Wives in those circumstances
2) Get the Vette and the Flying Lessons. I know of someone who owns a Cessna 172 that may let you use it for your first flight

(me) - and THEN sneak in a small aquarium.
3) Get the Vette, no flying lessons. It's a lot slower to sneak a reef aquarium into the house than a Vette.

And besides - I just bought a Pico 4.4 Gallon tank today...
Did I mention get the Vette?
p.s.: Proud Owner of a 2003 Triple Black Vert Vette, even though Sara B wouldn't race me with her Clown Shoe, 450RWHP, looks stock.
Proud owner of 58G (though lusting for a 180), a 50G freshwater, and a 4.4G PICO!!
AND proud owner of a Cessna 172 and a M20K Turbo Mooney, though I owe Hurley a phone call to get him current on the 172...