South Korea, Best Korea?

South Korea is a hotbed of evangelical Christian denominations and they are a significant political constituency.

Not an irrelevancy at all.

More than familiar with the place myself.

Disagree that religiosity is the preserve of the old there. Korea is almost unique in Asia with the role Protestant/evangelical churches play in everyday life (as well as the Catholic community). About one in three are Christian of some denomination or other, and they tend to be believers and not passive adherants. Membership of churches is closely aligned with social mobility and patronage networks (Lee Myung bak comes to mind as an example), and a place where one finds a spouse.

The faith communities have a large imprint on politics. It's no accident the current donkey of a President is both very conservative and enjoys almost uniform support from churches in Korea.

The below image could be almost any residential neighbourhood in any city in Korea. It's not some Christians in the country, it's a full third of the population, and they're very active in the practice of their faith. It's one of the things that's immediately striking about the country and that sets the place apart from other places in the region (and indeed something you should be wide-of when dealing with people). Christianity and neo-Confucianism is one of the primary reasons for the country's conservative bent.