The first one says it's near Volterra. If you look at the map the site supplies, it's in or near the hamlet of Ghizzano, which according to
Via Michelin mapping site is 32 km from Volterra (Sort of like all Rome apartments and hotels are within walking distance to the Pantheon and Spanish Steps).
For each of your above choices, I would read the text for the closest small hamlet, and look it up on a mapping site such as viamichelin, mappy or google, so you get a sense of where the place is actually located.
Some of your choices might be a little remote from services. It depends on what you want. How far is it to the grocery store, are there restaurants nearby? Are you planning on cooking in the whole time? If you picked one, what are the logical daytrips from that location? Do you care if it's a mile down a dirt road? If somebody gets up early, do they want to be able to walk to the nearest hamlet for a coffee? Is anyone planning on getting to a train/bus station, and going to a larger city for the day on public transportation?
You said in a previous post you will have 2 children, 5 and 9 with you. You might want to consider an agritourismo. These are usually a collection of apartments, and you would probably have to rent more than one, and would not have the place to yourselves. But they might have farm animals, play equipment, and the possibility that other children would be there. In my experience, children are most interested in other children.
For a first time visit to see wine country and countryside, probably the most popular choices are the Chianti region south of Florence (Greve in Chianti), southern Tuscany (Montepulciano, Pienza and Montalcino), or Umbria (Bevagna, Montefalco). These are only examples. Of course you don't have to stick to the most popular areas, but you might want to know what they are.
I haven't been there, but as an example, this agriturismo located in southern Tuscany is a SlowTrav favorite:
http://www.cretaiole.it/
