Electric are cheaper to buy and theres no conversion on efficiency. Electric is 100% efficient. But they have down sides.
You can order gas units at the box stores. Ng or propane. They will also install pretty cheap
I do atleast one water heater a week.
If you have the room and your well is that cold. Consider getting a holding tank ahead of the water heater. I did some calculations once and it can save a considerable amount of money over time.