I had the 2000 Trek 7700. It wasn't called the 7700FX, but just the Trek 7700. I bought it when I didnt' know that much about bicycles. I thought I wanted a hybrid, but it turns out that I really wanted a good solid touring bike like the Trek 520.
For a hybrid bicycle that you are going to be commuting on and doing Sunday rides. The Trek 7700 is a good bike, but I noticed that as I got more experienced in bicycle riding my eyes turned to the Trek 520.
I do remember that the Ruby Metro Suspension fork did bottom out after 2.5 years of hard riding. I wasn't happy about this. You can always get a rigid fork for then this happens.
The rear derailleur is great. Very smooth. It was the Shimano Nexave model.
The Rolf wheels look sexy. I quickly replaced the fat (flat prone) Invert 700 x 38 tires with the specialized armadillos. I recommended doing that if you get it. I had the 700 x 26 version. 700 x 28 is great for the the Trek 7700.
Good luck.