This was a tough decision to be honest, no icon really stood out that greatly to me, and I'll say why soon. But I went with Regeneration's icon. It is the most pleasing to the eye, the stock was probably the best also. I would have dis-qualified Derozio's icon, it doesn't convey the theme well enough, the text vaguely represents the theme but that's about it. Nice colours though, but I still think it was a little busy. Countryemo's was rather unappealing however, renders are usually a bad idea for an icon. Zappy's was too heavy on effects to be honest.
Regeneration GMV.