Chaos,
Congratulations on the decision to change things in your life, and on your new-found successes in riding. By enjoying the evening time with your wife on bikes, you've made it a family activity.
Bonus points...
My advice is to quit now while you still can.
Don't rush into the road bike purchase. Take the time to visit local shops and ask to test ride a few different ones. Let the LBS staff know about your progress and your interests, and see what you discover. Some bikes will be comfortable for you, while others won't feel quite right. That's the process of finding the one that's best for you now. You might also develop a reasonable budget figure after these first few visits. How much is enough, and how much is too much. Involving your wife will also help to keep things realistic, too. Thank her for her input.
Since you're in FL, you have the benefit of year round riding, which is great. The best time(s) to buy are during the dead time of winter and during the changeover between this year's and next year's models, which will happen in the late summer. Keep you eyes out on display bikes (that you've ridden and love) that may be even last year's model. There are deals there.
Also, continue to ask questions.
Good luck.