The Cannondale Quick 6 is a basic 3x7 hybrid with rim brakes for $650 (but the rear wheel has a cassette instead of a freewheel, which is good). The Marin Terra Linda 1 seems to be a much better value, also being a 3x7 bike with a cassette for only $470. It appears to have a step-through frame, which will have a different fit and feel from a traditional diamond frame. This bike also comes with cable-operated disc brakes (which are not necessarily an upgrade over rim brakes). The Fuji Absolute 1.9 is priced the same as the Cannondale, and comes with a 2x8 drivetrain and cable-operated disc brakes. The 2.1 version is priced lower at $590, and comes with a 3x7 drivetrain with a freewheel and rim brakes.

The Cannondale and Fuji bikes will probably feel very similar to each other, whereas the Marin will likely feel more upright oriented. In terms of components, all of these bikes have lower-end parts that will be durable for general recreational riding. I wouldn't focus as much on the equipment, and would focus more on which bike you like riding the most. Since you noted that all of these bikes are in stock near you, I'd absolutely not buy any of them until you've had a chance to ride them all to see what feels best to you. Don't discount subjective aspects like frame color; that's not something you can easily change.