Cajun,
There is nothing "wrong" with a sportster, but there are things to be aware of.
1. Unless you are both small people, the wife will not be riding far on the back. Not much room even if she is a size 3.
2. If you are a big guy, the bike will be to small for you, or you will look ridiculous on it.
3. Peanut gas tank is good for about 80 miles. Not a big deal riding around town, but if you want to go spend the day riding you will be visiting the gas station multiple times during the ride.
4. The 1200 will have much better getup and go, but will not be a bigger bike.
5. The Dyna suggestion is probably the best. It will be a bit more money, but it will hold it's value better long term. It is a larger engine, better transmission, and a more comfortable ride. The Mrs will fit better as well.
6. Most guys who buy a sportster for their first bike will trade up very quickly if they enjoy riding and intend to continue riding.
Regardless of what you purchase, take the Motorcycle Safety Foundation riders course. You will be amazed at what you learn. I wouldn't let anyone I loved get on a bike without taking the course. If you have the time and energy I would follow up it with the advanced course as soon as you are comfortable.