Now might be a good time, check it out
Just be aware that mask, snorkel and fins will run you $300-400 for good stuff. Books, DVD and cert card are another ~$150-200. Add in the cost of the course materials and cards, which most places include in the cost of certification, and you are back up to the normal price.
And once you get certified and you fall in love with scuba diving... you're going to want to buy your own BCD & Regulator/Octo and most likely a dive computer too. That's going to cost you another thousand or two when all is said and done.
It can be an expensive hobby but if you love your reef tank, then you will REALLY LOVE scuba diving. Especially if you do it in tropical waters.
Glad to hear you got the wife involved, she'll love it. We should definitely try to get together this summer for at least one dive. Soon ad I get my dive schedule together I'll let you know. Hoping to work some of the charters with my dive shop this year . If so I hope to have a pretty aggressive schedule.
What shop?