Unless you're expecting to drive 50+ miles per day, the 120v charger should be enough.
Yes and no.
If I decide I want to travel more than 50 miles at any given moment I'll have to make myself crazy where I can charge my car the night before.
in my opinion it's worth it to get the faster charger and unplug it should you feel you don't need more and that way you'll save on electric.
Or just fill it up that way you don't have to charge it the following days.
In my opinion it's a win-win getting the better charger.