Tim,
Frank is right. You will need to think of a plan on where to keep the trees in the winter. This is very important. Most people call fertilizer "plant food", but to me this belies a lack of understanding of how plants work. Fertilizer is like plant vitamins, light is plant food. And for a fast growing, fruit producing plant like a fig, they need direct sunlight, or very bright grow lights. If they are in a warm location, but do not get enough light, they will slowly starve. However, when they are dormant (which only happens when they are less than 40 degrees), they don't need any light.
The basement is almost certainly too warm. The trees will not go fully dormant, and will use up energy producing leaves, etc, which is not a good situation.
A south facing window would be OK, though not necessarily ideal. A west facing window probably will not provide enough light. If you think about it, a west facing window only gets direct sun for at most half the day. In the dead of winter, that is only about 4 hours, tops. And that sunlight is fairly weak due to the angle of the sun, etc. If you wanted to add a high wattage fluorescent light on a timer to supplement, your plant would do OK, but that might not be aesthetically pleasing. Otherwise, the lack of light would not be good for the tree.
If you have a large enough pot, you could keep it outside in zone 7, particularly if it's right next to a south facing wall. However, it's possible in an extreme cold spell, the pot could freeze, which would kill the plant. The roots are very sensitive to cold and have to stay above freezing. The branches of a fully dormant fig tree, can withstand temperatures down to 15 or 20 degrees.
If you had access to an outdoor garage, that would be a much better winter solution. The garage will prevent the tree from getting too cold, but it should be cold enough to allow the plant to go dormant.
Personally, I would figure all that out before I tried to decide which variety to grow. That's going to have more impact on your success, in my opinion.
Good luck.