What's with fitness?

I am proud to say that today, I got a gym membership! When I was in my late teens, and early twenties I worked jobs that kept me in shape, so I never worried about what I ate. After a few years of marriage, I hopped on the scale and the number on the dial made me gasp. I knew that I couldn't stay that heavy forever, so we made some diet changes. After several "crash diets" we made a long term, diet change. No more fast food 2 meals a day, no more treat cupboard, no more soda, and the binging had to stop.

About a year ago, my wife and I finally got to the point where we were eating plenty of fruit and veggies, and lots of water. With the changes to our lifestyle came some natural, slow weight loss. But then we hit a plateau. We've known that at some point we would have to get into a gym in order to shed the 100 pounds that we each needed to lose. Well, that day is today!

Next on my list, fitness monitors. Which one to get? FitBit seems to be nice, but when we walked into Best Buy earlier today, there were like 30 competitors to choose from. Now I need some advice before we sink $100+ per unit. Do you have a fitness monitor? What one do you have? What do you like and dislike about it? Does it interact with any apps that you love? How much did you pay? Seriously, we need some help!