I'm no theme person. I re-evaluate themes about once every four years.
Justpi is the best theme person in the forum. His advice is always good. You've selected several different themes with very different options. If you want a big slider in the header, you dont' want Koi; it won't do that. Nor will most of the others.
You might want to update that thread with a link to this thread. But remember, you can always register a different blog, make it private, and play with themes all you want.