I’ve always used gas for both cooktop & oven. Electric is supposedly better (though I believe nearly all commercial ovens are gas), but I’ve had no issues.
My Viking range has been very good, though I’m a little annoyed at having had to replace the igniters for the oven burners every 3 years or so. Holds a temp very well, though one oven runs about 25 degrees hot & the other about 25 deg. cold. Convection feature is nice but only used occasionally.
If I were to do it over again, I’d probably lose the grill, which is a pain to clean and is thus rarely used, and replace it with more burners or maybe a second griddle. My $.02 is to get the biggest one you can fit it your space. Same for the fridge.
NB: Commercial stoves are great in a commercial setting but a bad idea for residential use. They generally have no insulation and need six inches of airspace around them. I believe most building codes prohibit them, if for no other reason than they use pilot lights, rather than electric ignition.
But they sure are fun to use if you’ve got the right pans and exhaust.