As you noticed, property taxes take some getting used to, don't forget that includes vehicles so if you're fond of newer, pricier cars that bill will sting as well. Property taxes are pretty consistent year over year in any given town, depends on the local spending habits.

East of the river offers a lot of options, if you want a great public education for the kids Glastonbury needs to be considered. Much of the more rural towns rely on propane or oil for heat, neither is cheap at the moment. Heat pumps and geothermal require electricity, we're one of the most expensive states for that. Wood stoves and pellets are good options/supplements if you're willing to micromanage your heat source.

Having said all that, if your wife is going to work long term in Farmington, stay in that area. Good luck!