None of those. Get this
http://www.jamisbikes.com/usa/thebik...lite_spec.html
The Trek 7.6 FX has 25mm tires (not wide enough to handle dirt/gravel etc). The QX-S95 has a 42X32X24T crank set, 11-34T gearing. Not very good for speed, but only for uphill climbing. The Roam XR1 has a suspension (not good for speed and add weight).
The Jamis Allegro Elite has 32mm tires. Perfect for doing light off road and still have good speed on pavements. It also has a road style crank set and gears. Which will make it more speedy and won't make you pedal like a mad man like a 11-32, 11-34 gearing.