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An added bonus is that you will have no idea what temperature you're getting. :mad:
If gas is at all feasible, go gas.
I love glass/smooth tops, but you go electric, make sure the top has at least one element with a large-diameter - and it is more in the center of the stove and not off a corner. Not sure how big your stock pot is, but probably 14-16 inches at minumum diameter - so think of that.
I suggest bringing the lid of your largest canning stock pot to the store with you. Place it where it would go and you will be sure that it will meet your requirements.