House is 35 years old, 2 story, 3500sq. ft. Central heat/air.
Got a big propane furnace in the attic. (If all the "tin" was removed from this furnace, it'd look identical to the dinasour "stove" that used to be in my current home.
I got tired of fixing that dabm stove every year and sent er' packin! Installed one of those wall mount radiant heaters and never looked back. (works Better and Cheaper).

Anyway, back to the 3500sqft house: I'd like trashcan that 35 year old propane furnace/ electric ac unit, and just ALL OF IT. And, go back ALL Electric.

1) Any suggestions as to what Ton or size?
2) And/or Brand?
3) Any reason why I would NOT want to go All Electric? (just seems like a good idea to me?)