Hi there Camus,
I would not suggest bunny hopping or jumping off of curbs, if you can help it. These types of activities will only shorten the life your bicycle. Now rolling over cobblestone is considered as fairly normal terrain for road bikes. Especially for the road bikes that you have selected from bikesdirect. Any bike's brakes can be set up so that it skids
under certain conditions. The lower the coefficient of friction and the closer the pads are set in proximity to the rims or disc, the more likely the phenomenon of "skidding" will take place. Of course, use of disc brakes will increase that probability, even when properly set.
Your bicycle choices for commuting are great. As long as you're in an upright position to see traffic, you're good to go when commuting.
PS.
The Motobecane Cafe Noir would be my choice
