I walked into my LBS and fell in love with the Trek hybrids. Since my next door neighbor and is wife are big-time road racers I asked him where and what I should buy. He sent me to his buddy's shop and they talked me into the FX series. So I ordered up a 7300FX for me, a women specific 7200FX for the wife, and a 3700 with road tires for my 11yr old son. They're supposed to be in tomorrow, can't wait.
What got me over to the FX was when the dealer said if we ride 20 miles to the beach and back I'll use a lot more energy on the non-FX model. With the lower bars and non-suspension forks they are much more efficient. The suspension forks are just extra weight and not needed for road and smooth trail work. And the componentry is better on the FX too. Beautiful bikes. So we ordered up the set.
We used to ride bikes years ago and then I got heavy into motorcycles - all styles. I had as many as five bikes in the garage and rode them all. First the street bike went - if you crash one of those you die. Then the offroad racer - you just get busted up on those. Then the kid's bikes. I still have an old trials bike and may get a newer one. Then we got a jeep. And it's back to riding bicycles and the wifey is thrilled!
The non-FX model is definetly for more casual riding. The stance is very much upright, while the FX gets you down a little for lower wind resistance and better performance. We're a little more serious this time, wanting more performance now that my son is old enough to keep up.