Dacor makes a fine product (I have a fridge) but their customer service is a bit lacking. As you describe your cooking, the main concern will be cost of running your oven. What is consistently cheaper in your area, gas or electric energy? (Not that a home oven runs up the $$ that much. How often do you anticipate running the cleaning cycle? for example.)
I have a dual fuel with electric convection. But I've done lots of cooking with gas ovens too. Frankly, it's a toss up for me.
When the power goes off, your gas cooktop can be used, but your oven, electric or gas, can't. It's a safety measure they build in.